Stereospecific control of the metal-centred chirality of rhodium(<scp>iii</scp>) and iridium(<scp>iii</scp>) complexes bearing tetradentate CNN′P ligands
作者:María Carmona、Ricardo Rodríguez、Isabel Méndez、Vincenzo Passarelli、Fernando J. Lahoz、Pilar García-Orduña、Daniel Carmona
DOI:10.1039/c7dt01446e
日期:——
Ligands LH1–LH3 have been prepared by two successive condensation/reduction steps. These ligands react with MCl3 (M = Rh, Ir) rendering the trichlorido complexes [MCl3(κ3N,N′,P-LH)] (M = Rh, LH = LH1 (1), LH2 (2), LH3 (3); M = Ir, LH = LH1, (4)) as racemic mixtures of fac and mer isomers. Only one of the two possible fac isomers was detected. The mer isomer of the rhodium compounds 1–3 quantitatively
通过两个连续的缩合/还原步骤制备了配体LH1-LH3。这些配体与的MC1反应3(M =铑,铱)渲染trichlorido配合物[的MC1 3(κ 3 Ñ,Ñ ',P - LH)](M = RH,LH = LH1(1),LH2(2),LH3(3); M = Ir,LH = LH1,(4))为fac和mer异构体的外消旋混合物。两个可能的事实中只有一个检测到异构体。铑化合物1-3的mer异构体在数量上异构化为更稳定的fac异构体,而铱络合物4的mer异构体则没有。DFT计算表明该异构化的解离途径。在乙酸盐或三氟乙酸盐,复合物的存在1-3或4,分别经历他们的不含苄型臂得到相应dichlorido化合物[的MC1的环金属化2(κ 4 Ç,Ñ,Ñ ',P -大号)](M =左,右=L1(5),L2(6),L3(7);M = Ir,L=L1(8))。仅检测到三种可能的配位异构体对映异构体对之一。在立体