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Group of atoms giving a molecule characteristic properties
functional group is any substituent or moiety in a molecule that causes the molecule's characteristic chemical reactions. The same functional group will
Functional_group
Topics referred to by the same term
Look up functional group in Wiktionary, the free dictionary. The term functional group may have several meanings: Functional group, in organic chemistry
Functional group (disambiguation)
Functional_group_(disambiguation)
Implementation of the renormalization group
In theoretical physics, functional renormalization group (FRG) is an implementation of the renormalization group (RG) concept which is used in quantum
Functional renormalization group
Functional_renormalization_group
exothermically. Bruna, Pablo J.; Grein, Friedrich; Passmore, Jack (2011). "Density functional theory (DFT) calculations on the structures and stabilities of [CnO2n+1]2–
Polycarbonate (functional group)
Polycarbonate_(functional_group)
Political party in Indonesia
The Party of Functional Groups (Indonesian: Partai Golongan Karya, Indonesian pronunciation: ['partaɪ ɡoˈloŋan ˈkarja]), often known by its abbreviation
Golkar
A functional group is a collection of organisms that share characteristics within a community. Ideally, these would perform equivalent tasks based on domain
Functional_group_(ecology)
a compound with the functional group RnE(=O)xNR2, where x is not zero, E is some element, and each R represents an organic group or hydrogen. It is a
Amide_(functional_group)
Topics referred to by the same term
function Functional group, combination of atoms within molecules Medical conditions without currently visible organic basis: Functional symptom Functional disorder
Functional
Chemical group (–OH)
In chemistry, a hydroxy or hydroxyl group is a functional group with the chemical formula −OH and composed of one oxygen atom covalently bonded to one
Hydroxy_group
Topics referred to by the same term
and clinging Group (mathematics), a set together with a binary operation satisfying certain algebraic conditions Functional group, a group of atoms which
Group
Organic compound containing a –C(=O)OH group
participate in hydrogen bonding. Together, the hydroxyl and carbonyl group form the functional group carboxyl. Carboxylic acids usually exist as dimers in nonpolar
Carboxylic_acid
In organic chemistry, the vinyl iodide or iodoalkene functional group occurs when two carbon atoms are double-bonded to each other, and one carbon is bonded
Vinyl_iodide_functional_group
Organic compound containing the functional group R–CH=O
alcohol) is an organic compound containing a functional group with the structure R−CH=O. The functional group itself (without the "R" side chain) can be
Aldehyde
Chemical group, –C(=O)CH3
In organic chemistry, an acetyl group is a functional group denoted by the chemical formula −COCH3 and the structure −C(=O)−CH3. It is sometimes represented
Acetyl_group
Relatively large characteristic segment of a molecule
molecules, and it should not be used to describe or name smaller functional groups of atoms that chemically react in similar ways in most molecules that
Moiety_(chemistry)
hydroxyl group. Methylarsonic acid results when the substituent is a methyl group. Phenylarsonic acid results when the substituent is a phenyl group. The
Arsonic acid (functional group)
Arsonic_acid_(functional_group)
Technique for solving problems in the planning of organic syntheses
analogous reaction of benzyl bromide with sodium cyanide. Manipulation of functional groups can lead to significant reductions in molecular complexity. Numerous
Retrosynthetic_analysis
Chemical compounds and groups containing nitrogen with a lone pair (:N)
substituent groups bonded to the nitrogen atom, and are represented by the formula R 3 N {\displaystyle {\ce {R3N}}} . The functional group −NH2 present
Amine
System for naming organic chemical compounds
the main functional group is a terminal functional group (a group which can exist only at the end of a chain, like formyl and carboxyl groups), there is
IUPAC nomenclature of organic chemistry
IUPAC_nomenclature_of_organic_chemistry
Chemical compound
Pentyl is a five-carbon alkyl group or substituent with chemical formula −C5H11. It is the substituent form of the alkane pentane. In older literature
Pentyl_group
Organic functional group (Si–O–Si)
organosilicon chemistry, a siloxane is an organic compound containing a functional group of two silicon atoms bound to an oxygen atom: Si−O−Si. The parent siloxanes
Siloxane
Functional group (C=O)
In organic chemistry, a carbonyl group is a functional group with the formula C=O, composed of a carbon atom double-bonded to an oxygen atom, and it is
Carbonyl_group
Redox reaction that takes place with organic compounds
organic oxidation is gain of oxygen and/or loss of hydrogen. Simple functional groups can be arranged in order of increasing oxidation state. The oxidation
Organic_redox_reaction
least one hydroxyl group attached to a saturated carbon atom. Alcohols have the general formula R–OH. aldehyde A functional group and a class of organic
Glossary_of_chemistry_terms
Chemical coordination complex of an iron ion chelated to a porphyrin
appearance of molecular oxygen. Hemoproteins achieve their remarkable functional diversity by modifying the environment of the heme macrocycle within the
Heme
Cyclic chemical group (–C6H5)
be replaced by some other element or compound to serve as a functional group. A phenyl group has six carbon atoms bonded together in a hexagonal planar
Phenyl_group
quantity and purity for a given purpose without needing the addition of a functional group that exclusively serves to enable said transformation. Molecular complexity
Late-stage_functionalization
Subdiscipline of chemistry, focusing on carbon compounds
addition/functional group increases, there is a corresponding dipole, when measured, increases in strength. A dipole directed towards the functional group (higher
Organic_chemistry
Organic compound containing an –NO2 group
contain one or more nitro functional groups (−NO2). The nitro group is one of the most common explosophores (functional group that makes a compound explosive)
Nitro_compound
Presence of functional groups within a molecule
In chemistry, functionality is the presence of functional groups in a molecule. A monofunctional molecule possesses one functional group, a bifunctional
Functionality_(chemistry)
Molecular groups or substituents derived from an aromatic ring
In organic chemistry, an aryl is any functional group or substituent derived from an aromatic ring, usually an aromatic hydrocarbon, such as phenyl and
Aryl_group
Chemical group (–CH=CH2)
In organic chemistry, a vinyl group (abbr. Vi; IUPAC name: ethenyl group) is a functional group with the formula −CH=CH2. It is the ethylene (IUPAC name:
Vinyl_group
Class of chemical compounds
Hydrazines can be divided into three groups according to the degree of substitution. Hydrazines belonging to the same group behave similarly in their chemical
Hydrazines
Organosulfur compound
chemistry, the term sulfamide may also refer to the functional group which consists of at least one organic group attached to a nitrogen atom of sulfamide. Symmetric
Sulfamide
Neutral chemical compound with both a positively- and negatively-charged functional group
is any neutral chemical compound with a positively charged cationic functional group that bears no hydrogen atom, such as a quaternary ammonium or phosphonium
Betaine
Organic substituent with one or more free valences at a carbon atom
Acetonyl group Acyl group (e.g. acetyl group, benzoyl group) Alkyl group (e.g., methyl group, ethyl group) Alkenyl group (e.g., vinyl group, allyl group) Alkynyl
Organyl_group
Molecular moiety or the drug class that uses it
Sulfonamide is a functional group (a part of a molecule) that is the basis of several groups of drugs, which are called sulphonamides, sulfa drugs or
Sulfonamide_(medicine)
Chemical changes in proteins following their translation from mRNA
expand the chemical set of the 22 amino acids by changing an existing functional group or adding a new one such as phosphate. Phosphorylation is highly effective
Post-translational modification
Post-translational_modification
Chemical compounds with the same atoms but arranged and connected differently
2-propanol are structural isomers, but not functional isomers, since they have the same significant functional group (the hydroxyl –OH) and are both alcohols
Structural_isomer
Representation method in chemistry
spectra of compounds are called functional groups, as they give the molecule a function. Heteroatoms and functional groups are collectively called "substituents"
Skeletal_formula
Functional group, formula –CCl3
The trichloromethyl group is a functional group that has the formula −CCl3. The naming of this group is derived from the methyl group (which has the formula
Trichloromethyl_group
reports to the Ministry of Railways. It is organized into separate functional groups or verticals while divided into 19 operational zones geographically
Indian Railways organisational structure
Indian_Railways_organisational_structure
Si–OH functional group in silicon chemistry
A silanol is a functional group in silicon chemistry with the connectivity Si–O–H. It is related to the hydroxy functional group (C–O–H) found in all
Silanol
Molecule containing an equal number of positive and negative functional groups
that contains an equal number of positively and negatively charged functional groups. (1,2-dipolar compounds, such as ylides, are sometimes excluded from
Zwitterion
Chemical group (–SO2CF3)
group (systematic name: trifluoromethanesulfonyl group) is a functional group with the formula R−SO2CF3 and structure R−S(=O)2−CF3. The triflyl group
Triflyl_group
Chemical compound
compound, meaning, it contains both a quaternary ammonium functional group and a hydroxyl functional group. The cation of this salt, choline, occurs in nature
Choline_chloride
Type of material
which contain epoxide groups. The epoxide functional group is also collectively called epoxy. The IUPAC name for an epoxide group is an oxirane. Epoxy
Epoxy
Hydrocarbon compound containing one or more C=C bonds
double bonds. Acyclic alkenes, with only one double bond and no other functional groups (also known as mono-enes) form a homologous series of hydrocarbons
Alkene
Group of words in systemic functional grammar
In systemic functional grammar (SFG), a nominal group is a group of words that represents or describes an entity, for example The nice old English police
Nominal group (functional grammar)
Nominal_group_(functional_grammar)
Chemical process intended to reverse the polarity of a molecular functional group
of a functional group with the aim of the reversal of polarity of that group. This modification allows secondary reactions of this functional group that
Umpolung
Group of atoms introduced into a compound to prevent subsequent reactions
A protecting group or protective group is introduced into a molecule by chemical modification of a functional group to obtain chemoselectivity in a subsequent
Protecting_group
Topics referred to by the same term
hydroxy functional group OH−, hydroxide anion •OH, hydroxyl radical OH, the alcohol class of compounds, that possess a hydroxy functional group OH, prefix
Oh
Topics referred to by the same term
company Function field (disambiguation) Function hall Functional (disambiguation) Functional group (disambiguation) Functionalism (disambiguation) Functor
Function
Chemical compound
Often pinacolborane is abbreviated HBpin. It features a boron hydride functional group incorporated in a five-membered C2O2B ring. Like related boron alkoxides
Pinacolborane
Macromolecule with repeating units linked by amide bonds
functional groups. The carbonyl-component may be part of either a carboxylic acid group or the more reactive acyl halide derivative. The amine group and
Polyamide
chemistry is a functional group with the general structure RR'C=N-NH-Ts where Ts is a tosyl group. Organic compounds having this functional group can be accessed
Tosylhydrazone
Standardized computer chip nomenclature
but the standards differ. The functional group is also indicated by two letters in the Cyrillic alphabet and many groups were obviously copied from the
Soviet integrated circuit designation
Soviet_integrated_circuit_designation
Systematic rules for naming chemical compounds and chemistry concepts
the functional group — hence the principle of substitution. When multiple functional groups are present, one is designated as the principal group and
IUPAC nomenclature of chemistry
IUPAC_nomenclature_of_chemistry
Functional group
trimethylsilyl group (–Si(CH3)3, abbreviated TMS) is a functional group in organic chemistry. This group consists of three methyl groups bonded to a silicon
Trimethylsilyl_group
Class of chemical substituents
Electron-withdrawing groups are the opposite effect of electron-donating groups (EDGs). Both describe functional groups, however, electron-withdrawing groups pull electron
Electron-withdrawing_group
organic chemistry, the vanillyl group (also known as vanilloyl) is a functional group. Compounds containing a vanillyl group are called vanilloids, and include
Vanillyl_group
Anion with formula OCN and charge –1
cyanate functional group, −O−C≡N, are known as cyanates or cyanate esters. The cyanate functional group is distinct from the isocyanate functional group, −N=C=O;
Cyanate
Sequence of organic compounds with similar chemical properties
chemistry, a homologous series is a sequence of compounds with the same functional group and similar chemical properties in which the members of the series
Homologous_series
Chemical compound
synonyms, is an organic compound containing a phenyl functional group and a carboxylic acid functional group. It is a white solid with a strong honey-like odor
Phenylacetic_acid
Type of constituency at the Hong Kong legislative assembly
is a seat representing professional or special interest groups. Eligible voters in a functional constituency may include natural persons as well as other
Functional constituency (Hong Kong)
Functional_constituency_(Hong_Kong)
Functional group of the form R–SO2–C6H4–Br
para-bromophenylsulfonyl) group is a functional group with the chemical formula BrC6H4SO2 and structure Br−C6H4−SO2−R. This group is usually introduced using
Brosyl_group
Organic compounds of the form >C=O
distinct from other carbonyl-containing functional groups, such as carboxylic acids, esters and amides. The carbonyl group is polar because the electronegativity
Ketone
Chemical group (–C(=O)C6H5
the functional group with the formula −COC6H5 and structure −C(=O)−C6H5. It can be viewed as benzaldehyde missing one hydrogen. The benzoyl group has
Benzoyl_group
Any molecule with a cyano group (C≡N)
inorganic chemical compound that contains a C≡N functional group. This group, known as the cyano group, consists of a carbon atom triple-bonded to a nitrogen
Cyanide
Index of chemical compounds with the same molecular formula
represent a monovalent functional group derived from any hydrocarbon with formula C 5H 9 by removal of one hydrogen atom; or a divalent group derived from C 5H
C5H8
Chemical reactions involving organic compounds
be categorized based on the type of functional group involved in the reaction as a reactant and the functional group that is formed as a result of this
Organic_reaction
Anion and chemical group (–N3)
azides are organic compounds with the formula RN3, containing the azide functional group. The dominant application of azides is as a propellant in air bags
Azide
Organic compound
chemical formula CO(NH2)2. This amide has two amino groups (−NH2) joined by a carbonyl functional group (−C(=O)−). It is thus the simplest amide of carbamic
Urea
Chemical group (–CH2C≡CH)
organic chemistry, the propargyl group is a functional group of 2-propynyl with the structure HC≡C−CH2−. It is an alkynyl group derived from propyne (HC≡C−CH3)
Propargyl_group
Chemical group (>S(=O)2)
group is either a functional group found primarily in sulfones, or a substituent obtained from a sulfonic acid by the removal of the hydroxyl group,
Sulfonyl_group
Organic compound with at least one hydroxyl (–OH) group
type of organic compound that carries at least one hydroxyl (−OH) functional group bound to a saturated carbon atom. Alcohols range from the simple, like
Alcohol_(chemistry)
Chemical group (–CH3) derived from methane
In formulas, the group is often abbreviated as Me. This hydrocarbon group occurs in many organic compounds. It is a very stable group in most molecules
Methyl_group
Laboratory technique to separate ions and polar molecules
phase. The equilibrated stationary phase consists of an ionizable functional group where the targeted molecules of a mixture to be separated and quantified
Ion_chromatography
Molecule in which a sugar is bound to another functional group
glycoside /ˈɡlaɪkəsaɪd/ is a molecule in which a sugar is bound to another functional group via a glycosidic bond. Glycosides play numerous important roles in
Glycoside
Functional group
The trifluoromethyl group is a functional group that has the formula −CF3. The naming of is group is derived from the methyl group (which has the formula
Trifluoromethyl_group
Prefix in organic chemistry nomenclature
organic chemistry, a locant is a term to indicate the position of a functional group or substituent within a molecule. The International Union of Pure and
Locant
Chemical compound containing two hydroxyl (–OH) groups
containing two hydroxyl groups (−OH groups). An aliphatic diol may also be called a glycol. This pairing of functional groups is pervasive, and many subcategories
Diol
Liquid equilibrium model in statistical thermodynamics
In statistical thermodynamics, the UNIFAC method (UNIQUAC Functional-group Activity Coefficients) is a semi-empirical system for the prediction of non-electrolyte
UNIFAC
Chemical coupling reaction
kinds of functional groups such as OH, OR, nitroarenes, epoxides, and sometimes esters and amides. Even ketone, aldehyde, and nitrile groups can be present
Wittig_reaction
Chemical group (R–C=O)
Acylation Functional group IUPAC, Compendium of Chemical Terminology, 5th ed. (the "Gold Book") (2025). Online version: (2006–) "Acyl groups". doi:10.1351/goldbook
Acyl_group
Organic compound with the structure >C(O–)2
In organic chemistry, an acetal is a functional group with the connectivity R2C(OR')2. Here, the R groups can be organic fragments (a carbon atom, with
Acetal
ecology, functional equivalence (or functional redundancy) is the ecological phenomenon that multiple species representing a variety of taxonomic groups can
Functional equivalence (ecology)
Functional_equivalence_(ecology)
Salt, anion or ester of a sulfonic acid
sulfonate is a salt or anion of a sulfonic acid. The formula for this functional group is RSO−3. Sulfonates are the conjugate bases of sulfonic acids. Sulfonates
Sulfonate
Class of organic compounds
compounds that contain an amine (:N) functional group as well as either an aldehyde (−CH=O) or ketone (>C=O) functional group. These compounds are important
Aminoaldehydes and aminoketones
Aminoaldehydes_and_aminoketones
Chemical group (–SO2–C6H4–CH3)
toluenesulfonyl group (tosyl group, abbreviated Ts or Tos) is a univalent functional group with the chemical formula −SO2−C6H4−CH3. It consists of a tolyl group, −C6H4−CH3
Tosyl_group
nitroalkene, or nitro olefin, is a functional group combining the functionality of its constituent parts, an alkene and nitro group, while displaying its own chemical
Nitroalkene
Organic compounds made of alkyl/aryl groups bound to oxygen (R–O–R')
or more functional end-groups such as a hydroxyl group. The term "oxide" or other terms are used for high molar mass polymer when end-groups no longer
Ether
Organic compounds with the structure O=P(OR)3
Organophosphates are best known for their use as pesticides. Like most functional groups, organophosphates occur in a diverse range of forms, with important
Organophosphate
Anion, salt, functional group or ester derived from a phosphoric acid
A phosphate is an anion, salt, functional group or ester derived from a phosphoric acid. It most commonly means orthophosphate, a derivative of orthophosphoric
Phosphate
Chemical group (–OCH3)
organic chemistry, a methoxy group is the functional group consisting of a methyl group bound to oxygen. This alkoxy group has the formula R−O−CH3. On
Methoxy_group
Formation of a thioether (–S–) compound from a thiol (–SH) and an alkene ( >C=C< )
form a thiyl radical species. The radical then propagates with an ene functional group via an anti-Markovnikov addition to form a carbon-centered radical
Thiol-ene_reaction
Functional group
acetal is the functional group with the structural formula C6H5CH(OR)2 (R = alkyl, aryl). Benzylidene acetals are used as protecting groups in glycochemistry
Benzylidene_acetal
Organosulfur compounds containing –S(=O)2–N< functional group
sulfonamide functional group (also spelled sulphonamide) is an organosulfur group with the structure R−S(=O)2−NR2. It consists of a sulfonyl group (O=S=O)
Sulfonamide
Class of chemical compounds
An enamine is a functional group with the formula R2N−C(R′)=CR″2. Enamines are reagents used in organic synthesis and are intermediates in some enzyme-catalyzed
Enamine
Chemical group (–OC(O)CH3)
In organic chemistry, the acetoxy group (abbr. AcO– or –OAc; IUPAC name: acetyloxy), is a functional group with the formula −OCOCH3 and the structure −O−C(=O)−CH3
Acetoxy_group
FUNCTIONAL GROUP
FUNCTIONAL GROUP
Boy/Male
American, British, English
Mighty Spearman; The Fictional Character Jorel Father of Superman
Surname or Lastname
English
English : nickname from the animal, Middle English catte ‘cat’. The word is found in similar forms in most European languages from very early times (e.g. Gaelic cath, Slavic kotu). Domestic cats were unknown in Europe in classical times, when weasels fulfilled many of their functions, for example in hunting rodents. They seem to have come from Egypt, where they were regarded as sacred animals.English : from a medieval female personal name, a short form of Catherine.Variant spelling of German and Dutch Katt.
Male
Egyptian
, the son of the functionary Heknofre.
Male
Egyptian
, an Egyptian functionary.
Boy/Male
English
Modern. The fictional character Jorel father of Superman.
Boy/Male
American, Australian, British, English, French
Mighty Spearman; The Fictional Character Jorel Father of Superman
Biblical
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Boy/Male
American, British, English
Mighty Spearman; One who Saves; The Fictional Character Jorel Father of Superman
Male
Egyptian
, Functionary of the Interior.
Boy/Male
Buddhist, Indian, Japanese
Mysterious Function
Boy/Male
Australian, French
Fictional Swordsman; Ambitious and Filled with Religious Aspirations; From Alexander Dumas's Three Musketeers
Boy/Male
English
The fictional character Jorel father of Superman.
Boy/Male
French
Fictional swordsman: (ambitious and filled with religious aspirations) from Alexander Dumas's...
Male
Celtic
, great justiciary, or functionary.
Boy/Male
English
The fictional character Jorel father of Superman.
Male
Egyptian
, a great functionary.
Boy/Male
American, Australian, British, Danish, English, Finnish, French, German, Scandinavian
Farmer; The Fictional Character Jorel Father of Superman; Earth Worker
Boy/Male
English
The fictional character Jorel father of Superman.
Male
Egyptian
, an Egyptian functionary.
Male
Egyptian
, a high Egyptian functionary.
FUNCTIONAL GROUP
FUNCTIONAL GROUP
Boy/Male
African, Australian
First Born of Twins; From Yoruba
Girl/Female
Spanish
Chaperon.
Boy/Male
Irish
Black.
Boy/Male
Anglo Saxon
Encourages.
Boy/Male
Indian, Sikh
Love of the Guru
Male
Babylonian
, Adad-Anu.
Girl/Female
Tamil
A shout of Joy, Rejoicing
Boy/Male
American, French, Indian, Tamil
Loving; Son of Waves; Faithful; Loyal
Boy/Male
Shakespearean
Antony and Cleopatra'. Friend to Pompey.
Boy/Male
Tamil
FUNCTIONAL GROUP
FUNCTIONAL GROUP
FUNCTIONAL GROUP
FUNCTIONAL GROUP
FUNCTIONAL GROUP
a.
Relating to friction; moved by friction; produced by friction; as, frictional electricity.
v. i.
To execute or perform a function; to transact one's regular or appointed business.
n.
An angle upon which the value of some function depends; -- a term used more especially in connection with elliptic functions.
a.
Pertaining to, or characterized by, fiction; fictitious; romantic.
a.
Fractional.
a.
Pertaining to, or connected with, a function or duty; official.
v. t.
To supply with an organ or organs having a special function or functions.
a.
Relatively small; inconsiderable; insignificant; as, a fractional part of the population.
a.
Pertaining to the function of an organ or part, or to the functions in general.
n.
One charged with the performance of a function or office; as, a public functionary; secular functionaries.
a.
Capable of, or pertaining to, flection or inflection.
n.
A quantity so connected with another quantity, that if any alteration be made in the latter there will be a consequent alteration in the former. Each quantity is said to be a function of the other. Thus, the circumference of a circle is a function of the diameter. If x be a symbol to which different numerical values can be assigned, such expressions as x2, 3x, Log. x, and Sin. x, are all functions of x.
a.
Of or pertaining to fractions or a fraction; constituting a fraction; as, fractional numbers.
n.
The appropriate action of any special organ or part of an animal or vegetable organism; as, the function of the heart or the limbs; the function of leaves, sap, roots, etc.; life is the sum of the functions of the various organs and parts of the body.
n.
Paper fractional currency.
adv.
In a functional manner; as regards normal or appropriate activity.
n.
A derived function; a function obtained from a given function by a certain algebraic process.
v. i.
Alt. of Functionate
pl.
of Functionary
n.
The office, duties, or functions of a minister, servant, or agent; ecclesiastical, executive, or ambassadorial function or profession.