Bis(diphenylphosphino) methnedicopper (I) units bridged by dicarboxylates

摘要

Two novel compounds , [(#mu-dppm)_2Cu_2(O_2CC_6H_4CO_2)Cu_2(#mu#-dppm)_2](PF_6)_2 centre dot 3.4 CH_2Cl_2(1.3.4CH_2Cl_2) and [(#mu-dppm)_2Cu_2(O_2CC_6H_4CO_2)Cu_2(#mu#-dppm)_2](PF_6)_2 centre dot 5 CH_2Cl_2(2.5CH_2Cl_2) have been prepared from the reactions of [(#mu-dppm)_2Cu_2(CH_3CN)_2](PF_6)_2 with the corresponding dicarboxylate salts , and their structures have been determined crystallographically. The crystal structures of 1 and 2 consist of the complex cations [(#mu-dppm)_2Cu_2(L-L)Cu_2(#mu#-dppm)_2]~(2+) , in which two dppm-bridged dinuclear copper (I) units are lined by dicarboxylate bridged L-L~(2-)(L-L=O_2CC_6H_4CO_2) and O_2CC_2F_4CO_2 ) in an end -to end fashion, FP_6~- ions and dichloromethane molecules. The Cu…Cu separations within the [((#mu#)-dppm)_2Cu_2]~(2+) units are 2.707 (1) and 2.833 (1) A in 1 and 2, respectively. In both complexes, the copper (I) centers are in a trigonal coordination evnironment comprised by one O and two p atoms; additional contacts between the Cu centers and chlorine atoms of dichloromethane are observed in 2.