Znorg. Chem. 1991, 30, 2120-2129
2120
support of portions of this work. Partial support provided to D.B.R. by t h e N a t i o n a l Institutes of Health under Grant GM 20424 and the Getty Conservation Institute is also acknowledged.
6. Both the formation and dissociation kinetics of t h e CUI'([14]aneNzS2) complex are found t o b e extremely sluggish in strongly acidic solution where t h e terms involving two hydrogen ions are presumed t o predominate. This phenomenon is attributed t o t h e difficulty in inverting a coordinated nitrogen during t h e stepwise bonding and dissociation process and should influence all similar macrocyclic ligands involving t w o nitrogens separated by an ethylene linkage. We express Our appreciation to Wayne State University for a Rumble G r a d u a t e Fellowship awarded t o V.B.P. and t o t h e Research Corp. and t h e University of Wisconsin-Eau Claire Research and Creativity Fund for g r a n t s t o L.A.O. in
Registry No. [ 14]aneN2S2,87939-30-8; [ 14]aneNSSN, 87939-29-5; [ 14]aneNS3, 87939-28-4; [ I4]aneNSNS, 55702-76-6; [ 1SIaneNS,, 1163 19-25-6: 1151aneN,SI.
