A convenient and efficient preparation of trifluoromethyl-phosphorus and -arsenic hydrides

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Abstract
The compounds CF3MH2 and (CF3)2MH (M = P or As) can be prepared in high yield by the reduction of the corresponding iodides with hydrogen iodide and mercury. Under the same conditions the diphosphine and diarsine, (CF3)2M·M(CF3)2, can be reduced to (CF3)2MH, and the cyclic tetramer and pentamer, (CF3M)4,5 to CF3MH2.