Complexation of 3,4-bis(cyanamido)cyclobutane-1,2-dione dianion with copper. Crystal structures and spectroscopic data of copper-(I) and -(II) complexes
Abstract
Three complexes [Cu2(PPh3)4(MeCN)2(cis-(NCN)2sq)]·MeCN 1, {[Cu2(dien)2(cis-(NCN)2sq)2]·5H2O}n2 and [Cu(tren)(cis-(NCN)2sq)] 3 where [cis-(NCN)2sq]2− = 3,4-bis(cyanamido)cyclobutane-1,2-dione dianion, have been synthesized and characterized by electronic absorption and IR spectroscopies. The structures of the three complexes have been determined by