Diphenylcyanoarsine

Diphenylcyanoarsine

Names
Preferred IUPAC name Diphenylarsinous cyanide
Systematic IUPAC name Diphenylarsanecarbonitrile
Other names Clark 2 Diphenylarsinecarbonitrile Diphenylarsine cyanide Di(phenyl)arsanylformonitrile Diphenylcyanoarsine
Identifiers
CAS Number	23525-22-6
ChemSpider	58070
EC Number	245-716-6
Jmol interactive 3D	Image Image
MeSH	Clark+2
PubChem	64506
InChI InChI=1S/C13H10AsN/c15-11-14(12-7-3-1-4-8-12)13-9-5-2-6-10-13/h1-10H Key: BDHNJKLLVSRGDK-UHFFFAOYSA-N InChI=1/C13H10AsN/c15-11-14(12-7-3-1-4-8-12)13-9-5-2-6-10-13/h1-10H
SMILES C1=CC=C(C=C1)[As](C#N)C2=CC=CC=C2 N#C[As](C1=CC=CC=C1)C1=CC=CC=C1
Properties
Chemical formula	C13H10AsN
Molar mass	255.002920742 g mol^−1
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Diphenylcyanoarsine, also called Clark 2 (Chlor-Arsen-Kampfstoff 2, being the successor of Clark 1) by the Germans, was discovered in 1918 by Sturniolo and Bellinzoni^[1] and shortly thereafter used like the related Clark 1 gas by the Germans for chemical warfare in the First World War. The substance forms colourless, garlic-smelling crystals and causes nausea, vomiting and headaches. It can subsequently lead to e.g. pulmonary oedema (fluid on the lungs).

See also

• Clark 1
• Chemical weapons

References

1. Sturniolo, G. und Bellinzoni , G. (1919); Boll. chim. pharm., 58, 409–410