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Chemical compound
Triatomic hydrogen or H3 is an unstable triatomic molecule containing only hydrogen. Since this molecule contains only three atoms of hydrogen it is the
Triatomic_hydrogen
Polyatomic ion (H3, charge +1)
unparalleled by any other polyatomic ion. The trihydrogen cation is the simplest triatomic molecule, because its two electrons are the only valence electrons in
Trihydrogen_cation
Chemical element with atomic number 1 (H)
the interstellar medium. Neutral triatomic hydrogen H3 can exist only in an excited form and is unstable. Hydrogen is the third most abundant element
Hydrogen
Molecules made of three atoms
that element. Ozone, O3 is an example of a triatomic molecule with all atoms the same. Triatomic hydrogen, H3, is unstable and breaks up spontaneously
Triatomic_molecule
Chemical compound
Hydrogen peroxide is a chemical compound with the formula H2O2. In its pure form, it is a very pale blue liquid; however, at lower concentrations, it appears
Hydrogen_peroxide
Physical and chemical properties of pure water
"A precise solution of the rotation bending Schrödinger equation for a triatomic molecule with application to the water molecule". Journal of Molecular
Properties_of_water
Chemical compound
Hydrogen fluoride is an inorganic compound with chemical formula HF. It is a colorless gas or liquid that dissolves in water to yield hydrofluoric acid
Hydrogen_fluoride
Topics referred to by the same term
channel Triatomic hydrogen (H3), an unstable molecule Trihydrogen cation (H+3), one of the most abundant ions in the universe Tritium (3H), or hydrogen-3,
H3
Compounds containing hydrogen
; McNab, I. R. (1989). "The infrared predissociation spectrum of triatomic hydrogen cation (H3+)". Accounts of Chemical Research. 22 (6): 218–222. doi:10
Hydrogen_compounds
Poisonous and flammable gas
Hydrogen sulfide (preferred IUPAC name and American English) or hydrogen sulphide (Commonwealth English) is a chemical compound with the formula H2S. It
Hydrogen_sulfide
Chemical compound
The compound hydrogen chloride has the chemical formula HCl and as such is a hydrogen halide. At room temperature, it is a colorless gas, which forms white
Hydrogen_chloride
Chemical compound
Hydrogen cyanide (also called prussic acid) is a chemical compound with the formula HCN and structural formula H−C≡N. It is a highly toxic and flammable
Hydrogen_cyanide
Molecular ion
Few-body systems Helium atom Helium hydride ion Trihydrogen cation Triatomic hydrogen Lambert W function Molecular astrophysics Holstein–Herring method
Dihydrogen_cation
Void between celestial bodies
particle densities, constituting a near-perfect vacuum of predominantly hydrogen and helium plasma, permeated by electromagnetic radiation, cosmic rays
Outer_space
Chemical compound
Hydrogen selenide is an inorganic compound with the formula H2Se. This hydrogen chalcogenide is the simplest and most commonly encountered hydride of
Hydrogen_selenide
Chemical compound with hydrogen and chalcogen atoms
chemical formula H2X, with X representing any chalcogen. They are therefore triatomic. They take on a bent structure and as such are polar molecules. Water
Hydrogen_chalcogenide
Isotope of hydrogen with one neutron
Deuterium (hydrogen-2, symbol 2H or D, also known as heavy hydrogen) is one of two stable isotopes of hydrogen; the other is protium, or hydrogen-1, 1H. The
Deuterium
Molecule composed of one element
diatomic molecules include hydrogen (H2), oxygen (O2), nitrogen (N2) and all of the halogens. Ozone (O3) is a common triatomic homonuclear molecule. Homonuclear
Homonuclear_molecule
Hydrocarbon compound (CH4) in natural gas
compound that has the chemical formula CH4 (one carbon atom bonded to four hydrogen atoms). It is a group-14 hydride, the simplest alkane, and the main constituent
Methane
Chemical compound
Ammonia is an inorganic chemical compound of nitrogen and hydrogen with the formula NH3. A stable binary hydride and the simplest pnictogen hydride, ammonia
Ammonia
Chemical compound
dihydride, hydrogen polonide, or polane) is a chemical compound with the formula PoH2. It is a liquid at room temperature, the second hydrogen chalcogenide
Polonium_hydride
Chemical compound
The hydroperoxyl radical, also known as the hydrogen superoxide, is the protonated form of superoxide with the chemical formula HO2, also written HOO•
Hydroperoxyl
Chemical acid found in vinegar
acetyl). The carboxymethyl functional group derived from removing one hydrogen from the methyl group of acetic acid has the chemical formula −CH2−C(=O)−OH
Acetic_acid
Triatomic oxygen molecule
completely decomposes urea: (NH2)2CO + O3 → N2 + CO2 + 2 H2O Ozone is a bent triatomic molecule with three vibrational modes: the symmetric stretch (1103.157 cm−1)
Ozone
Chemical compound
49.5 kcal/mol (207 kJ/mol), which is unusually weak for a bond to the hydrogen atom. Nitroxyl is produced from the reagents Angeli's salt (Na2N2O3) and
Nitroxyl
Triatomic molecule
is a simple triatomic bent molecule with C2v molecular symmetry and bond angle of 104.5° between the central oxygen atom and the hydrogen atoms. Despite
Chemical_bonding_of_water
German-Canadian physicist and physical chemist (1904–1999)
absorption and emission Methylene (compound) Pseudo Jahn–Teller effect Triatomic hydrogen Vibronic coupling List of German Canadians Stoicheff, B. P. (2003)
Gerhard_Herzberg
Chemical compound, tautomer of hydrogen cyanide
(CH−3). Hydrogen isocyanide (HNC) is a linear triatomic molecule with C∞v point group symmetry. It is a zwitterion and an isomer of hydrogen cyanide (HCN)
Hydrogen_isocyanide
Covalent chemical bond between hydrogen and carbon atoms
In chemistry, the carbon–hydrogen bond (C−H bond) is a chemical bond between carbon and hydrogen atoms that can be found in many organic compounds. This
Carbon–hydrogen_bond
Chemical compound hydrogen phosphide
organophosphines, which are derived from PH3 by substituting one or more hydrogen atoms with organic groups. They have the general formula PH3−nRn. Phosphanes
Phosphine
Simplest carboxylic acid (HCOOH)
(e.g. hydrogen tetrafluoroborate in anhydrous hydrogen fluoride). The difference has been ascribed to a transition state stabilized by hydrogen bonding
Formic_acid
Form of electromagnetic radiation
at the Lyman limit (wavelength 91.2 nm, the energy needed to ionise a hydrogen atom from its ground state), with "hard UV" being more energetic; the same
Ultraviolet
American physicist and diplomat (1898–1986)
cyclotron. Three of his last research articles concerned detection of triatomic hydrogen and helium-3. His appointment as department chair forced him to devote
Henry_DeWolf_Smyth
Chemical compound
an ammonium cation ([NH4]+), and a bifluoride (or hydrogen difluoride) anion ([HF2]−). The triatomic bifluoride anion features a strong three-center four-electron
Ammonium_bifluoride
Charts of molecules
small molecules. For instance, if one replaces any one of the atoms in a triatomic molecule with a rare gas atom, there will be a drastic change in the molecule’s
Periodic systems of small molecules
Periodic_systems_of_small_molecules
Form of water
in which all hydrogen atoms are hydrogen-2 isotope or deuterium (2 H or D, also known as heavy hydrogen) rather than the common hydrogen-1 isotope (1
Heavy_water
Chemical compound
Hydrogen deuteride is an isotopologue of dihydrogen composed of two isotopes of hydrogen: the majority isotope 1H (protium) and 2H (deuterium). Its proper
Hydrogen_deuteride
Chemical compound
additions of compounds containing an acidic proton. Water, hydrogen sulfide, and hydrogen selenide react with cyanamide to give urea, thiourea, and selenourea
Cyanamide
Chemical compound
tricarbon can be viewed as propadiene with four hydrogen atoms removed, or as propane with eight hydrogen atoms removed; and as such, propadienediylidene
Tricarbon
Hypothetical stage in the early evolutionary history of life on Earth
produce over 50 aminoacids in a laboratory setting by using only hydrogen sulfide, hydrogen cyanide (presumably produced after outer space meteorites reacted
RNA_world
Molecule composed of any two atoms
a diatomic molecule consists of two atoms of the same element, such as hydrogen (H2) or oxygen (O2), then it is said to be homonuclear. Otherwise, if a
Diatomic_molecule
Matter and radiation in the space between the star systems in a galaxy
density of the matter. The interstellar medium is composed primarily of hydrogen, followed by helium with trace amounts of carbon, oxygen, and nitrogen
Interstellar_medium
Chemical compound
foreign bodies. In living organisms, HOCl is generated by the reaction of hydrogen peroxide with chloride ions under the catalysis of the heme enzyme myeloperoxidase
Hypochlorous_acid
Chemical element with atomic number 8 (O)
spontaneous decomposition of hydrogen trioxide in water or the reaction of hydrogen peroxide with hypochlorite. Triatomic oxygen (ozone, O3) is a very
Allotropes_of_oxygen
Chemical compound of hydrogen and oxygen
solvent. Water, being a polar molecule, undergoes strong intermolecular hydrogen bonding which is a large contributor to its physical and chemical properties
Water
Chemical compound
Hydrogen telluride is the inorganic compound with the formula H2Te. A hydrogen chalcogenide and the simplest hydride of tellurium, it is a colorless gas
Hydrogen_telluride
Chemical compound
the oxidation of water by fluorine, which produces hydrogen fluoride, oxygen difluoride, hydrogen peroxide, ozone and oxygen. HOF is explosive at room
Hypofluorous_acid
Life arising from non-living matter
except for hydrogen and some helium and lithium. Basic chemical ingredients of life – the carbon-hydrogen molecule (CH), the carbon-hydrogen positive ion
Abiogenesis
chemical elements in the universe is dominated by the large amounts of hydrogen and helium which were produced during Big Bang nucleosynthesis. Remaining
Abundance of the chemical elements
Abundance_of_the_chemical_elements
Hydrocarbon compound (H2C=CH2)
fruits. The hydrate of ethylene is ethanol. This hydrocarbon has four hydrogen atoms bound to a pair of carbon atoms that are connected by a double bond
Ethylene
Organic ammonia derivative
or CH3NH2. This colorless gas is a derivative of ammonia, but with one hydrogen atom being replaced by a methyl group. It is the simplest primary amine
Methylamine
Chemical compound (H–N=C=O)
Isocyanic acid is the simplest stable chemical compound that contains carbon, hydrogen, nitrogen, and oxygen, the four most commonly found elements in organic
Isocyanic_acid
Chemical compound
ion) with chemical formula HeH+. It consists of a helium atom bonded to a hydrogen atom, with one electron removed. It can also be viewed as protonated helium
Helium_hydride_ion
Electronic state with no minimum in the potential energy
emission spectrum, making repulsive states easy to detect. For example, triatomic hydrogen has a repulsive ground state, which means it can only exist in an
Repulsive_state
molecular dipole. The most common molecule in the Universe, H2 (molecular hydrogen), is completely invisible to radio telescopes because it has no dipole;
List of interstellar and circumstellar molecules
List_of_interstellar_and_circumstellar_molecules
Organic compound (CH3–C≡N); simplest organic nitrile
structure H3C−C≡N. This colourless liquid is the simplest organic nitrile (hydrogen cyanide is a simpler nitrile, but the cyanide anion is not classed as organic)
Acetonitrile
Wide-bandgap semiconductor and abrasion-resistant ceramic
the more expensive process of chemical vapor deposition (CVD) of silane, hydrogen, and nitrogen. Homoepitaxial and heteroepitaxial SiC layers can be grown
Silicon_carbide
Chemical compound
human. The moist solid emits small amounts of hydrogen cyanide due to hydrolysis (reaction with water). Hydrogen cyanide is often described as having an odor
Potassium_cyanide
Possible alternative biochemicals used by life forms
with hydrogen sulfide oceans, the source of the hydrogen sulfide could come from volcanoes, in which case it could be mixed in with a bit of hydrogen fluoride
Hypothetical types of biochemistry
Hypothetical_types_of_biochemistry
Molecular geometry
bond angle between the two hydrogen atoms is approximately 104.45°. Nonlinear geometry is commonly observed for other triatomic molecules and ions containing
Bent_molecular_geometry
Chemical compound
made with noble gases. This chemical was synthesized by mixing argon and hydrogen fluoride on a caesium iodide surface at 8 K (−265 °C), and exposing the
Argon_fluorohydride
Hydrocarbon compound (HC≡CH)
discovered in 1836 by Edmund Davy, who identified it as a "new carburet of hydrogen". It was an accidental discovery while attempting to isolate potassium
Acetylene
Chemical compound
bromoperoxidases, which are enzymes that catalyze the oxidation of bromide with hydrogen peroxide: Br− + H2O2 ↽ − ⇀ {\displaystyle {\ce {<=>>}}} HOBr + OH− Hypobromous
Hypobromous_acid
Chemical compound (SiH4)
First, silicon is treated with hydrogen chloride at about 300 °C to produce trichlorosilane, HSiCl3, along with hydrogen gas, according to the chemical
Silane
Total number of atoms present in a molecule
Examples include H2 (hydrogen), N2 (nitrogen), O2 (oxygen), F2 (fluorine), and Cl2 (chlorine). Halogens are usually diatomic. Triatomic (composed of three
Atomicity_(chemistry)
Caustic soda, with formula NaOH
molecules. The hydrogen atoms of the hydroxyls form strong bonds with oxygen atoms within each O layer. Adjacent O layers are held together by hydrogen bonds between
Sodium_hydroxide
Organic chemical compound
catalyst. The process was once attractive because of the value of the hydrogen coproduct, but in modern times is not economically viable. The hydroformylation
Acetaldehyde
Chemical compound
methylidynephosphane is cyaphide. Methylidynephosphane is the phosphorus analogue of hydrogen cyanide, with the nitrile nitrogen replaced by phosphorus. Methylidynephosphane
Methylidynephosphane
Chemical compound
Ammonium is a modified form of ammonia that has an extra hydrogen atom. It is a positively charged (cationic) molecular ion with the chemical formula NH+4
Ammonium
Type of interstellar cloud
absorption nebulae, the formation of molecules (most commonly molecular hydrogen, H2), and the formation of H II regions. This is in contrast to other areas
Molecular_cloud
Chemical compound
With a boiling point of −144.75 °C, OF2 is the most volatile (isolable) triatomic compound. The compound is one of many known oxygen fluorides. Oxygen difluoride
Oxygen_difluoride
CH3OH; simplest possible alcohol
distillation of wood. Today, methanol is mainly produced industrially by hydrogenation of carbon monoxide. Methanol consists of a methyl group linked to a
Methanol
Neutral form of the hydroxide ion
significant in radiation chemistry, where their formation can lead to hydrogen peroxide and oxygen, which in turn can accelerate corrosion and stress
Hydroxyl_radical
R. McNab, Iain (1989). "The infrared predissociation spectrum of triatomic hydrogen cation (H3+)". Accounts of Chemical Research. 22 (6): 218–222. doi:10
Jovian Infrared Auroral Mapper
Jovian_Infrared_Auroral_Mapper
Class of molecules formed by ultraviolet irradiation of organic compounds
astronomical bodies. The key elements of tholins are carbon, nitrogen, and hydrogen. Laboratory infrared spectroscopy analysis of experimentally synthesized
Tholin
Cyclic compound (C2H4O)
organic solvent. Ethylene fluorohydrin is obtained differently, by boiling hydrogen fluoride with a 5–6% solution of ethylene oxide in diethyl ether. The ether
Ethylene_oxide
Hydrocarbon compound (C6H6)
joined in a planar hexagonal ring with one hydrogen atom attached to each. As it contains only carbon and hydrogen atoms, benzene is a hydrocarbon. Benzene
Benzene
Uniformity of handedness
iodide Sulfanyl Sulfur mononitride Sulfur monoxide Titanium(II) oxide Triatomic Aluminium(I) hydroxide Aluminium isocyanide Amino radical Carbon dioxide
Homochirality
Estimate of extraterrestrial civilizations
21 cm (1,420.4 MHz). This is the wavelength of radio emission by neutral hydrogen, the most common element in the universe, and they reasoned that other
Drake_equation
Potassium compound and alternative to salt
iodide Sulfanyl Sulfur mononitride Sulfur monoxide Titanium(II) oxide Triatomic Aluminium(I) hydroxide Aluminium isocyanide Amino radical Carbon dioxide
Potassium_chloride
Chemical group (–CH3) derived from methane
alkyl derived from methane, containing one carbon atom bonded to three hydrogen atoms, having chemical formula CH3 (whereas normal methane has the formula
Methyl_group
High-energy particle, mainly originating outside the Solar System
of beta particle). Of the nuclei, about 90% are simple protons (i.e., hydrogen nuclei); 9% are alpha particles, identical to helium nuclei; and 1% are
Cosmic_ray
Life that does not originate on Earth
known as abiogenesis. During most of its stellar evolution, stars combine hydrogen nuclei to make helium nuclei by stellar fusion, and the comparatively lighter
Extraterrestrial_life
Dust floating in space
subjected to interstellar medium (ISM) conditions, are transformed, through hydrogenation, oxygenation and hydroxylation, to more complex organics – "a step along
Cosmic_dust
Carbon-containing chemical compound
chemistry". Generally, any large chemical compound containing a carbon–hydrogen or carbon–carbon bond is accepted as an organic compound. Thus alkanes
Organic_compound
Chemical compound
production: As a photocatalyst, it can break water into hydrogen and oxygen. With the hydrogen collected, it could be used as a fuel. The efficiency of
Titanium_dioxide
Chemical compound
element in 1998 after researchers found a cosmic ratio of phosphorus to hydrogen (P/H) of about 3×10−7. Even with the prevalence of phosphorus in interstellar
Phosphorus_monoxide
Toxic chemical compound (NaCN)
It is a moderately strong base. Sodium cyanide is produced by treating hydrogen cyanide with sodium hydroxide: HCN + NaOH → NaCN + H2O Worldwide production
Sodium_cyanide
Organic compound
It is ineffective against bacterial spores, which can be treated with hydrogen peroxide. A solution of 70% ethanol is more effective than pure ethanol
Ethanol
Solid organic matter in sedimentary rocks
lead to further changes in kerogen composition, including the losses of hydrogen, oxygen, nitrogen, sulfur, and their associated functional groups, along
Kerogen
Matter with biological processes
chemical elements for their biochemical functioning. These include carbon, hydrogen, nitrogen, oxygen, phosphorus, and sulfur—the elemental macronutrients
Life
Electrically neutral group of two or more atoms
a chemical compound composed of more than one element, e.g. water (two hydrogen atoms and one oxygen atom; H2O). In the kinetic theory of gases, the term
Molecule
Study involving matter and electromagnetic radiation
spectral lines of hydrogen. These equated discrete quantum jumps of the bound electron in a hydrogen atom to the discrete hydrogen spectrum. Max Planck's
Spectroscopy
Chemical group (=CH2)
formula CH2 (also written [CH2] and not to be confused with compressed hydrogen, which is also denoted CH2). It is a colourless gas that fluoresces in
Methylene_(compound)
Chemical compound
iodide Sulfanyl Sulfur mononitride Sulfur monoxide Titanium(II) oxide Triatomic Aluminium(I) hydroxide Aluminium isocyanide Amino radical Carbon dioxide
Methyl_acetate
Hexagonal lattice made of carbon atoms
graphene oxide paper. Full hydrogenation from both sides of the graphene sheet results in Graphane, but partial hydrogenation leads to hydrogenated graphene
Graphene
Chemical compound (H–S–C≡N)
M.; Nelson, Jane; Nelson, S. M.; Pullin, A. D. E. (1969). "Spectra and hydrogen-bonding of characteristics of thiocyanic acid. Part 4.—Association with
Thiocyanic_acid
Chemical compound
(CN)2 + 2 CuCN + 2 K2SO4 Industrially, it is created by the oxidation of hydrogen cyanide, usually using chlorine over an activated silicon dioxide catalyst
Cyanogen
Scientific study of matter's behavior and properties
geometry often called its structure. While the structure of diatomic, triatomic or tetra-atomic molecules may be trivial, (linear, angular pyramidal etc
Chemistry
Chemical compound
Hypoiodous acid Hydrogen, H Oxygen, O Iodine, I Names IUPAC name Hypoiodous acid Identifiers CAS Number 14332-21-9 Y 3D model (JSmol) Interactive
Hypoiodous_acid
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