... 40 CuCl 2 was dehydrated by treatment with SOCl 2 ; 28 [Cu(CH 3 CN) 4 ]ClO 4 was synthesized 29 and ... General Procedure for the Synthesis of the Copper Complexes. ... m, 880 m, 757 m cm - 1 ; MS (APCI, MeCN): m/z = 540 [M] + , 502 [(1)Cu] + , 441 [(1)] + ; elemental analysis ...