Most syntheses of organoarsenic compounds are prepared from arsenic chlorides or arsenic hydrides. Ultimate care should be given for handling of these arsenic intermediates due to their volatility. To stimulate the field of organoarsenic chemistry, practical synthetic methods should be discovered.We have synthesized 1,4-dihydro-1,4-diarsinines (cis-DHDA) by radical reaction of pentamethylcyclopentaarsine and acetylene derivatives  . The bimetallic complex and the monometallic complex were synthesized by stoichiometric addition of PtCl2(PhCN)2 to cis-DHDA in toluene. The interior angles at around the arsenic and the As-C=C bond angle were significantly varied in a series of the present platinum(II) complexes.  These observations suggest that the flexibility of the bond angles at around the arsenic center is inherent property in the present organoarsenic compounds and the flexibility might be a main reason for stabilization of strained complexes and enable synthesis of unusual complexes.

Synthesis of organoarsenic compounds and their functions

244th National Meeting (2012)

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