Cyaarside, also called cyarside, is the As≡C anion. Featuring a triple bond between arsenic and carbon, it is the arsenic analogue of cyanide and cyaphide.

Cyaarside anion
Names
Preferred IUPAC name
Cyaarside
Systematic IUPAC name
Arsenidocarbonate(II)
Other names
Cyarside[1]
Identifiers
3D model (JSmol)
  • InChI=1S/CAs/c1-2/q-1
    Key: LSOQRAIANSLHSE-UHFFFAOYSA-N
  • [As]#[C-]
Properties
CAs
Molar mass 86.933 g·mol−1
Conjugate acid Methylidynearsine
Related compounds
Related compounds
CP; CN; AsCAs2−
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Preparation

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An actinide cyaarside complex can be prepared by C−O bond cleavage of the arsaethynolate anion, the arsenic analogue of cyanate and phosphaethynolate.[2] Reaction of the uranium complex [((Ad,MeArO)3N)UIII(DME)] with one molar equivalent of [Na(OCAs)(dioxane)
2.5
]
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

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References

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  1. ^ "Beyond Cyanide: Future Synthons Based on the Cyaphide and Cyarside Ions for the Synthesis of Designer Magnetic Coordination Polymers". Grants on the Web. EPSRC. Retrieved 5 August 2023.
  2. ^ Hoerger, Christopher J.; Heinemann, Frank W.; Louyriac, Elisa; Rigo, Massimo; Maron, Laurent; Grützmacher, Hansjörg; Driess, Matthias; Meyer, Karsten (2019). "Cyaarside (CAs) and 1,3-Diarsaallendiide (AsCAs2–) Ligands Coordinated to Uranium and Generated via Activation of the Arsaethynolate Ligand (OCAs)". Angewandte Chemie. 58 (6): 1679–1683. doi:10.1002/anie.201811332. PMID 30427562. S2CID 53306476.