Synthesis and characterization of the chromium(III) complexes of ethylene cross-bridged cyclam and cyclen ligands
作者:Danny L. Maples、Randall D. Maples、Wesley A. Hoffert、Trenton H. Parsell、Allan van Asselt、Jon D. Silversides、Stephen J. Archibald、Timothy J. Hubin
DOI:10.1016/j.ica.2008.09.034
日期:2009.4
10-tetraazabicyclo[5.5.2]tetradecane)chromium(III) chloride, Dichloro(4,10-dibenzyl-1,4,7,10-tetraazabicyclo[5.5.2]tetradecane) chromium(III) chloride, and Dichloro(4,11-dimethyl-1,4,8,11-tetraazabicyclo[6.6.2] hexadecane)chromium)(III) chloride have been prepared by the reaction of anhydrous chromium(III) chloride with the appropriate cross-bridged tetraazamacrocycle. Aquation of these complexes proved difficult, but
二氯(4,10-二甲基-1,4,7,10-四氮杂双环[5.5.2]十四烷)氯化铬(III),二氯(4,10-二苄基-1,4,7,10-四氮杂双环[5.5。通过无水铬的反应制备了2]十四烷)氯化铬(III)和二氯(4,11-二甲基-1,4,8,11-四氮杂双环[6.6.2]十六烷)铬)(III)氯化物(Ⅲ)氯化物与适当的交叉桥连的四氮杂大环。这些配合物的水合证明是困难的,但是直接由氯化铬(II)络合,然后直接合成氯代羟基(4,11-二甲基-1,4,8,11-四氮杂双环[6.6.2]十六烷)铬)(III)氯化物。在有水的情况下暴露于空气或与空气反应。通过X射线晶体结构测定来表征这四个配合物。如乙烯跨桥所规定的,它们都包含变形的八面体几何形状的铬(III)离子和顺式-V构型的大环。羟基配合物的进一步表征显示出mu(eff)= 3.95 BM的磁矩和乙腈在lambda(max)= 583nm(epsilon