کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1326970 | 977455 | 2006 | 9 صفحه PDF | دانلود رایگان |

The synthesis and characterization of amido-amine cyclam based metal complexes is described. A novel tetraazamacrocycle ligand precursor (Li2[1,8-Bn2-1,4,8,11-tetraazacyclotetradecane], Li2Bn2cyclam, 2) is reported. Reactions of 2 with MCl4(THF)2 afforded M(Bn2cyclam)Cl2 (M = Zr 3, Hf 4). The two complexes show trigonal prismatic metal coordination geometries in the solid-state molecular structures. The cross-bridged cyclam 1,4,8,11-tetraazabicyclo[6.6.2]hexadecane (CB-H2cyclam 5) was used to prepare the lithiated ligand precursor (CB-Li2cyclam 6) and (CB-(Me3Si)2cyclam 7). M(CB-cyclam)Cl2 (M = Zr 8, Hf 9) were synthesized from reactions of MCl4(THF)2 with 6. The structures of 3 and 4 are compared with those of zirconium and hafnium complexes derived from cyclam and unsaturated tetraazamacrocyclic ligands.
Reactions of Li2[1,8-Bn2-1,4,8,11-tetraazacyclotetradecane] (Li2Bn2cyclam) with MCl4(THF)2 afforded M(Bn2cyclam)Cl2 (M = Zr 3, Hf 4). M(CB-cyclam)Cl2 (M = Zr 8, Hf 9; CB = 1,4,8,11-tetraazabicyclo[6.6.2]hexadecane) were synthesized from reactions of MCl4(THF)2 with a cross-bridged cyclam derivative (CB-Li2cyclam 5). A comparison of solid-state molecular structures of dianionic cyclam based zirconium complexes is presented.Figure optionsDownload as PowerPoint slide
Journal: Journal of Organometallic Chemistry - Volume 691, Issue 18, 1 September 2006, Pages 3853–3861