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|Section2= }} Diphenylchloroarsine (DA) is the organoarsenic compound with the formula (C6H5)2AsCl. It is a low-melting solid. It is highly toxic and was once used in chemical warfare. It is also an intermediate in the preparation of other organoarsenic compounds. The molecule consists of a pyramidal As(III) center attached to two phenyl rings and one chloride. ==Preparation and structure== It was first produced in 1878 by Michaelis and La Coste. It is prepared by the reduction of diphenylarsonic acid with sulfur dioxide. An idealized equation is shown: :Ph2AsO2H + SO2 + HCl → Ph2AsCl + H2O + SO3 The structure consists of pyramidal As centre. The As-Cl distance is 2.26 A and the Cl-As-C and C-As-C angles are 96 and 105°, respectively. 抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Diphenylchlorarsine」の詳細全文を読む スポンサード リンク
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