Induced distant cotton effects in complexes of Cr(III) with l-malic acid and heterocyclic ligands
作者:S. Bunel、E. Moraga
DOI:10.1016/s0277-5387(00)88071-7
日期:1984.1
Complexes of Cr(III) with l-malic acid and aromatic bases [2,2′-bipyridine (bipy) or 1,10-phenanthroline (phen)] and different counter ions were synthesized. Analyses and experiments carried out indicate that no more than one l-malate ligand enters the coordination sphere and that it behaves as a bidentate ligand. Optical rotatory dispersion and circular dichroism measurements always show a vicinal
合成了Cr(III)与L-苹果酸和芳香族碱[2,2'-联吡啶(bipy)或1,10-菲咯啉(phen)]和不同的抗衡离子的配合物。进行的分析和实验表明,不超过一个的l-苹果酸酯配体进入配位球,并且其表现为双齿配体。旋光色散和圆二色性测量在dd跃迁中始终显示出有害作用,因此建议铬在所有配合物中都采用最低可能的微观对称性:在紫外区域中,在π-π*跃迁中诱导光学活性并非如此一直存在。