Cyaarside, also called cyarside, is the As≡C
− anion
An ion () is an atom or molecule with a net electrical charge.
The charge of an electron is considered to be negative by convention and this charge is equal and opposite to the charge of a proton, which is considered to be positive by convent ...
. Featuring a
triple bond
A triple bond in chemistry is a chemical bond between two atoms involving six bonding electrons instead of the usual two in a covalent single bond. Triple bonds are stronger than the equivalent single bonds or double bonds, with a bond order o ...
between
arsenic
Arsenic is a chemical element with the symbol As and atomic number 33. Arsenic occurs in many minerals, usually in combination with sulfur and metals, but also as a pure elemental crystal. Arsenic is a metalloid. It has various allotropes, but ...
and
carbon
Carbon () is a chemical element with the symbol C and atomic number 6. It is nonmetallic and tetravalent
In chemistry, the valence (US spelling) or valency (British spelling) of an element is the measure of its combining capacity with o ...
, it is the arsenic analogue of
cyanide
Cyanide is a naturally occurring, rapidly acting, toxic chemical that can exist in many different forms.
In chemistry, a cyanide () is a chemical compound that contains a functional group. This group, known as the cyano group, consists of ...
and
cyaphide
Cyaphide, P≡C−, is the phosphorus analogue of cyanide. It is not known as a discrete salt, however ''In silico'' measurements reveal that the −1 charge in this ion is located mainly on carbon (0.65), as opposed to phosphorus.
Preparation
Org ...
.
Preparation
An actinide cyaarside complex can be prepared by C−O bond cleavage of the
arsaethynolate anion, the arsenic analogue of
cyanate
Cyanate is an anion with the structural formula , usually written . It also refers to any salt containing it, such as ammonium cyanate.
It is an isomer of the much less stable fulminate anion .William R. Martin and David W. Ball (2019): "Small ...
and
phosphaethynolate The phosphaethynolate anion, also referred to as PCO, is the phosphorus-containing analogue of the cyanate anion with the chemical formula or . The anion has a linear geometry and is commonly isolated as a salt. When used as a ligand, the phosphae ...
.
Reaction of the uranium complex [] with one molar equivalent of [ in the presence of 2.2.2-cryptand results in the formation of a dinuclear, oxo-bridged uranium complex featuring a C≡As ligand.
See also
* [
rsaalkyne (As≡CR)
References
{{reflist
Anions
Arsenic compounds