Diphenylcyanoarsine

Diphenylcyanoarsine
Preferred IUPAC name Diphenylarsinous cyanide
Systematic name Diphenylarsanecarbonitrile
Other names Clark 2 Diphenylarsinecarbonitrile Diphenylarsine cyanide Di(phenyl)arsanylformonitrile Diphenylcyanoarsine
Identifiers
CAS number	23525-22-6 Y
PubChem	64506
ChemSpider	58070 Y
EC number	245-716-6
MeSH	Clark+2
Jmol-3D images	{{#if:C1=CC=C(C=C1)[As](C#N)C2=CC=CC=C2N#C[As](C1=CC=CC=C1)C1=CC=CC=C1|Image 1 Image 2
SMILES C1=CC=C(C=C1)[As](C#N)C2=CC=CC=C2 N#C[As](C1=CC=CC=C1)C1=CC=CC=C1
InChI InChI=1S/C13H10AsN/c15-11-14(12-7-3-1-4-8-12)13-9-5-2-6-10-13/h1-10H Y Key: BDHNJKLLVSRGDK-UHFFFAOYSA-N Y InChI=1/C13H10AsN/c15-11-14(12-7-3-1-4-8-12)13-9-5-2-6-10-13/h1-10H
Properties
Molecular formula	C13H10AsN
Molar mass	255.15 g mol−1
Except where noted otherwise, 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
• Clark 3
• Chemical weapons

References

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