@article {2197, title = {trans-Disubstituted diamido/diamine cyclam zirconium complexes}, journal = {Inorganic Chemistry Communications}, volume = {11}, number = {10}, year = {2008}, note = {ISI Document Delivery No.: 367KCTimes Cited: 6Cited Reference Count: 24Munha, Rui F. Alves, Luis G. Maulide, Nuno Duarte, M. Teresa Marko, Istvan E. Fryzuk, Michael D. Martins, Ana M.}, month = {Oct}, pages = {1174-1176}, type = {Article}, abstract = {The reaction of H-2[1,8-dibenzyl-1,4,8,11-tetraazacyclotetradecanel (H(2)Bn(2)CYclam) with 2 equiv of LiBu gives Li(2)Bn(2)Cyclam(L)2 (L = Et2O or THF) that reacts with ZrCl4(THF)(2) to afford (Bn(2)Cyclam)ZrCl2 in 40\% yield. Alternatively (Bn(2)Cyclam)ZrCl2 may be obtained via ZrCl2(CH2SiMe3)(2)(Et2O)(2) in a significantly higher yield (87\%), avoiding the lithiation of H(2)Bn(2)Cyclam. The syntheses of other H-2*Bn(2)CYClaM ligand precursors (*Bn = 3,5-dimethylbenzyl and 3,5-di(tert-butyl)benzyl) and the corresponding Zr derivatives ({3,5-Me2Bn}(2)-Cyclam)ZrCl2 and ({3,5-(Bu2Bn)-Bu-t}(2)-Cyclam)ZrCl2 are also reported. Results on preliminary tests of E-caprolactone and ethylene polymerisation reactions are presented. (C) 2008 Elsevier B.V. All rights reserved.}, keywords = {amido ligands, CATALYSTS, CHEMISTRY, CONTAIN, Cyclam, epsilon-Caprolactone polymerisation, ETHYLENE, HAFNIUM COMPLEXES, LIGANDS, macrocycles, OLEFIN POLYMERIZATION, polymerisation, Tetraazamacrocycles, TITANIUM COMPLEXES, ZIRCONIUM}, isbn = {1387-7003}, url = {://000260549900019}, author = {Munha, R. F. and Alves, L. G. and Maulide, N. and Duarte, M. T. and Marko, I. E. and Fryzuk,Michael D. and Martins, A. M.} }