Synthesis and Characterisation of [(en)2Co]3+ Complexes Coordinated by Substituted Thiourea Ligands
作者:Lee Roecker、Mohammed Aiyegbo、Aladdin Al-Haddad、Emily Fletcher、Ravi Kc、Jason Hurst、Timothy Lane、Ryan Larsen、Nicholas Noinaj、Say Lee Teh、Samuel K. Wade、Sean Parkin
DOI:10.1071/ch13150
日期:——
spectroscopy . Twelve para-substituted and one meta-substituted ligands were studied: N,N′-dibenzylthiourea (1a); N-(R)phenyl-N′-benzylthiourea R = H (2a), NO2 (2b), CH3 (2c)}; N-(R)phenyl-N′-(R′)phenylthiourea R, R′: H, H (3a), H, CH3 (3b), OCH3, NO2 (3c), CH3, NO2 (3d)}; N-methyl-N′-(R)phenylthiourea R = H (4a), CH3 (4b), OCH3 (4c), NO2 (4d), 3-CH3 (4e)}. The solid state structure (X-ray) of one isomer
当与[(en)2 Co(OSO 2 CF 3)2 ] +在四亚甲基砜中反应时,取代的硫脲配体以双齿方式结合,通过硫原子和去质子化的硫脲氮原子形成四元环。不对称配体的反应导致配位异构体的形成,其中一些可以通过使用Sephadex SPC-25的柱色谱法分离。配位异构体易于根据可见和1 H NMR光谱进行区分。研究了十二个对位取代和一个对位取代的配体:N,N'-二苄硫脲(1a); N-(R)苯基-N'-苄硫脲R = H(2a),NO 2(2b),CH 3(2c)};N-(R)苯基-N '-(R')苯基硫脲R,R':H,H(3a),H,CH 3(3b),OCH 3,NO 2(3c),CH 3,NO 2(3d)}; N-甲基-N '-(R)苯硫脲R = H(4a),CH 3(4b),OCH 3(4c),NO 2(4d),3-CH 3(4e)}。的一种异构体的固态结构(X射线)共4a中作为它的高氯酸盐确认由提出的配位模式1个H