Syntheses and electronic, electrochemical, and theoretical studies of a series of μ-oxo-triruthenium carboxylates bearing orthometalated phenazines
作者:Camila F. N. da Silva、Malik Al-Afyouni、Congcong Xue、Frederico Henrique do C. Ferreira、Luiz Antônio S. Costa、Claudia Turro、Sofia Nikolaou
DOI:10.1039/c9dt04435c
日期:——
triruthenium clusters [Ru3O(OAc)5(L)(py)2]PF6, where L = dppn (benzo[i]dipyrido[3,2-a:2',3'-c]phenazine, 1); dppz (dipyrido[3,2-a:2',3'-c]phenazine, 2); CH3-dppz (7-methyldipyrido [3,2-a:2',3'-c] phenazine, 3); Cl-dppz (7-chlorodipyrido [3,2-a:2',3'-c] phenazine, 4); and phen (1,10-phenanthroline, 5). The EPR spectra collected at 10 K displayed one isotropic signal without a hyperfine structure and with
这项工作报告了一系列的五乙酸三钌簇[Ru3O(OAc)5(L)(py)2] PF6,其中L = dppn(苯并[i]双吡啶[3,2-a:2',3'- c]吩嗪,1);dppz(dipyrido [3,2-a:2',3'-c]吩嗪,2); CH3-dppz(7-甲基二吡啶并[3,2-a:2',3'-c]吩嗪,3); Cl-dppz(7-氯二吡啶并[3,2-a:2',3'-c]吩嗪,4); 和phen(1,10-菲咯啉,5)。在10 K处收集到的EPR光谱显示出一个没有超精细结构且g值为〜2.0的各向同性信号,这表明五乙酸三钌簇是顺磁性的,并且其电子离域类似于母体六乙酸酯的电子离域。复合体。1 H NMR分析表明,原金属化的吩嗪显着降低了化合物的对称性。碳负离子和环电流的感应效应超过了顺磁各向异性的影响,并主导了光谱。这导致与母体六乙酸盐化合物观察到的配体参数(例如pKa)缺乏典型的相关性。D