从M(NMe 2)4(M = Ti,Zr)与C 2对称配体(R)-2,2'-之间的反应制备了一系列新的钛(IV)和锆(IV)酰胺双(吡啶-2-基甲基氨基)-6,6'-二甲基-1,1'-联苯(2 H 2),(R)-2,2'-双(吡咯-2-基亚甲基氨基)-6,6' -二甲基-1,1'-联苯(3 H 2),(R)-2,2'-双(二苯基膦酰基氨基)-6,6'-二甲基-1,1'-联苯(4 H 2),(R)-2,2'-双(甲磺酰氨基)-6,6'-二甲基-1,1'-联苯(5 H 2),(R)-2,2'-双(对甲苯磺酰基氨基)-6,6'-二甲基-1,1'-联苯(6 H 2)和C 1对称配体,(R)-2-(二苯基硫代磷氨基) -2'-(二甲氨基)-6,6'-二甲基-1,1'-联苯(7 H)和(R)-2-(吡啶-2-基氨基)-2'-(二甲氨基)-6,6衍生自(R)-2,2'-二氨基-6,6'-二甲基-1,1'-联苯的'-二甲基-1
Syntheses of new tetradentate ligands, containing a bianiline backbone and two additional heterocyclic N-donors, and of chiral zirconiumcomplexes containing these ligands as dianions are reported. Crystal structures of some of these complexes show a preference for coordinating the two remaining ligands in a trans- rather than cis-orientation. Nevertheless, these complexes are moderately active in MAO-activated
Iron(ii), manganese(ii) and cobalt(ii) complexes containing tetradentate biphenyl-bridged ligands and their application in alkane oxidation catalysis
作者:George J. P. Britovsek、Jason England、Andrew J. P. White
DOI:10.1039/b513886h
日期:——
A series of manganese(II), iron(II) and cobalt(II) bis(triflate) complexes containing linear tetradentate bis(imine) and bis(amine) ligands with a biphenyl bridge have been synthesized. The twist in the ligand backbone due to the biphenyl unit leads in the case of the bis(imine) ligands (1 and 2) containing sp2 hybridised N donors, to a distorted cis-alpha coordination geometry, whereas in the case
合成了一系列含有线性联四齿双(亚胺)和双(胺)配体并带有联苯桥的锰(II),铁(II)和钴(II)双(三氟甲磺酸酯)配合物。在双(亚胺)配体(1和2)包含sp2杂化的N供体的双(亚胺)配体的情况下,配体主链的扭曲导致扭曲的顺式-α配位几何,而在联苯的情况下和联苯醚桥联的双(胺)配体(7-9和12),观察到反式配位几何。已经评价了使用H 2 O 2作为氧化剂的配合物对环己烷氧化的催化性能。在使用的条件下,只有铁络合物显示出任何催化活性,但是观察到的低转化率和选择性表明这些催化剂主要导致自由基自氧化。