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Compounds with similar properties to polyatomic halogens
compounds. Pseudohalogens occur in pseudohalogen molecules, inorganic molecules of the general forms Ps–Ps or Ps–X (where Ps is a pseudohalogen group), such
Pseudohalogen
Chemical compound
colorless and highly toxic gas with a pungent odor. The molecule is a pseudohalogen. Cyanogen molecules are linear, and consist of two CN groups ‒ analogous
Cyanogen
Chemical compound
chloride is an inorganic compound with the formula ClCN. This triatomic pseudohalogen is an easily condensed colorless gas. More commonly encountered in the
Cyanogen_chloride
Class of positively-charged molecules
This set index article includes a list of related items that share the same name (or similar names). If an internal link incorrectly led you here, you
Onium_ion
Chemical element with atomic number 6 (C)
(CN−) has a similar structure, but behaves much like a halide ion (pseudohalogen). For example, it can form the nitride cyanogen molecule ((CN)2), similar
Carbon
Chemical compound (BrCN)
methionine), and synthesize other compounds. The compound is classified as a pseudohalogen. The carbon atom in cyanogen bromide is bonded to bromine by a single
Cyanogen_bromide
Abbreviations used in chemistry
discussion St: steel (occasionally used) X: any halogen (or sometimes pseudohalogen) From organic chemistry: Ac: acetyl – (also used for the element actinium:
Chemical_symbol
Class of chemical compounds
results in the corresponding hydrogen halide, which is also acidic. A pseudohalogen would instead generate a hypopseudohalous acid. It is uncertain that
Hypohalous_acid
Chemical reaction used to synthesize aryl halides from aryl diazonium salts
byproducts. The substitution of the aromatic diazo group with a halogen or pseudohalogen is initiated by a one-electron transfer mechanism catalyzed by copper(I)
Sandmeyer_reaction
Chemical compound
Thiocyanogen, (SCN)2, is a pseudohalogen derived from the pseudohalide thiocyanate, [SCN]−, with behavior intermediate between dibromine and diiodine
Thiocyanogen
Chemical compound
in ordinary conditions is a yellow solid. Formally, it is an inter-pseudohalogen. Iodine azide can be prepared from the reaction between silver azide
Iodine_azide
Organometallic chemical reaction
but are not limited to, an alkyl, aryl, alkynyl, allyl, halogen, or pseudohalogen group. The reaction is usually an irreversible process due to thermodynamic
Transmetalation
Group of highly reactive chemical elements
in their tendency to form monopositive cations. Analogously to the pseudohalogens, they have sometimes been called "pseudo-alkali metals". These substances
Alkali_metal
Atmospheric phenomenon
thus extremely reactive. The effectiveness of different halogens and pseudohalogens as catalysts for ozone destruction varies, in part due to differing
Ozone_depletion
Chemical element with atomic number 55 (Cs)
auride (Cs+ Au− ) upon heating. The auride anion here behaves as a pseudohalogen. The compound reacts violently with water, yielding caesium hydroxide
Caesium
Topics referred to by the same term
fungi, and plants, in algology, mycology, and botany Iodine cyanide, a pseudohalogen with formula ICN or CNI ICN (SBB-CFF-FFS), a Swiss intercity tilting
ICN
Chemical compound
reagent in the synthesis of other organic compounds. DPPA undergoes pseudohalogen replacement of the azido group by treatment with nucleophilic reagents
Diphenylphosphoryl_azide
Group of chemical elements
bond Halogen addition reaction Halogen lamp Halogenation Interhalogen Pseudohalogen This could also be the case for group 12, although copernicium's melting
Halogen
(the molecule, the usual form of chlorine). Likewise in describing pseudohalogens, 氰 (qíng) may on occasion mean a single CN− cyanide ion (e.g. as in
Organic nomenclature in Chinese
Organic_nomenclature_in_Chinese
Chemical compound
Fluorine azide or triazadienyl fluoride is a yellow green gas composed of nitrogen and fluorine with formula FN3. Its properties resemble those of ClN3
Fluorine_azide
Chemical compound
iodine cyanide is a compound with the chemical formula ICN. It is a pseudohalogen composed of iodine and the cyanide group. It is a highly toxic inorganic
Cyanogen_iodide
Molecule containing only halogen elements of two or more kinds
are used to form polyhalides. Similar compounds exist with various pseudohalogens, such as the halogen azides (FN3, ClN3, BrN3, and IN3) and cyanogen
Interhalogen
Chemical compound consisting of hydrogen bonded to a halogen element
hydrochlorination of ethylene: C2H4 + HCl → CH3CH2Cl Chemistry portal Pseudohalogen Hypohalous acid Group 13 hydrides Group 14 hydrides Group 15 hydrides
Hydrogen_halide
Chemical compound
NOCl reacts with silver thiocyanate to give silver chloride and the pseudohalogen nitrosyl thiocyanate: ClNO + AgSCN → AgCl + ONSCN Similarly, it reacts
Nitrosyl_chloride
the lowest oxidation state (+1) of halogens in their oxoanions. The pseudohalogen analogues are hypopseudohalites. Hypohalites, especially hypochlorite
Hypohalite
Chemical compound
or chemical compound containing the [SeH]− ion. The radical HSe is a pseudohalogen. Hydroselenide can be a ligand in transition metal complexes where it
Hydroselenide
Chemical compound
iminoethers. It directly fluorinates activated arenes. Behaving like a pseudohalogen, CF3OF adds to ethylene to give the ether:[citation needed] CF3OF +
Trifluoromethyl_hypofluorite
Chemical compound
Cyanogen azide is a chemical compound with the chemical formula CN4, or more precisely −N=N+=N−C≡N. It is an azide compound of carbon and nitrogen. It
Cyanogen_azide
Reiß, F., Schulz, A. and Villinger, A., 2016. Isolation of Labile Pseudohalogen NSO Species. Angewandte Chemie International Edition, 55(27), pp. 7680–7684
List of metal-organic chemical vapour deposition precursors
List_of_metal-organic_chemical_vapour_deposition_precursors
Chemical compound
its bis(triphenylphosphine)iminium salt. [TeCN]− is classified as a pseudohalogen, similarly to its lighter congeners cyanate, thiocyanate, and selenocyanate
Tellurocyanate
Chemical compound
anion which has a hydrogen atom connected to a tellurium atom. HTe is a pseudohalogen. Organic compounds containing the -TeH group are called tellurols. "Tellanide"
Hydrotelluride
Molecule
cyanide and a halogen. Cyanogen halides are chemically classified as pseudohalogens. The cyanogen halides are a group of chemically reactive compounds which
Cyanogen_halide
Chemical compound
Cyanogen fluoride (IUPAC name: carbononitridic fluoride) is an inorganic compound with the chemical formula FCN. The molecule of this compound is linear
Cyanogen_fluoride
Chemical compound
Bromine azide is an explosive inorganic compound with the formula BrN3. It has been described as a crystal or a red liquid at room temperature.[citation
Bromine_azide
Chemical compound
Chlorine azide (ClN3) is an inorganic compound that was discovered in 1908 by Friedrich Raschig. Concentrated ClN3 is notoriously unstable and may spontaneously
Chlorine_azide
Israeli organic chemist (1930–2024)
Hassner’s research group has studied: Regioselective additions of pseudohalogens; Stereochemistry of reactions of azides and organic nitrogen functions;
Alfred_Hassner
Polish-born American physical chemist
(2025). "Factors Governing H3+ Formation from Methyl Halogens and Pseudohalogens". Nat. Commun. 16 410: 14 pages. doi:10.1038/s41467-024-55065-5. Shen
Piotr_Piecuch
Chemical substances containing yttrium
phosphine oxides. [11] Yttrium and halogens (except fluorine [12] ) or pseudohalogens can also form complexes, such as Cs3[Y2I9], (Bu4N)3 [Y(NCS)6 ], etc
Yttrium_compounds
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