A Simple Method for the Preparation of Pentaammine Complexes Containing Anions Derived from Acids of Low Volatility

摘要

A method applicable to the preparation of complexes of the type MX(NH3)5Z+, with M = Co(III), Rh(III), Cr(III), has been used to prepare the new compounds CoH2PO3(NH3)5(ClO4)2, Rh(TS)(NH3)5 (TS)2(TS =p-toluenesulfonate, C7H7SO3) and RhH2PO2(NH3)5(ClO4)2and also to improve the synthesis of the known compounds CoPO4(NH3)5z+and CrPO4(NH3)5. The method involves heating a salt of MY(NH3)5Z+(where Y is the anion of an acid that can be easily displaced) in molten HX. The acid HX used should be anhydrous or contain as little water as possible to avoid partial or total aquation.