Ortho-ruthenation of 1-naphthalenyl in 1-naphthaldehyde 4-R-benzoylhydrazones: Ruthenium(III) CNO pincer complexes
作者:Koppanathi Nagaraju、Samudranil Pal
DOI:10.1016/j.jorganchem.2013.08.024
日期:2013.11
magnetic moments (μeff) of 1–5 are within 1.92–1.99 μB and they display rhombic EPR spectra in frozen (130 K) dichloromethane–toluene (1:1). Cyclic voltammetry with dimethylformamide solutions of the complexes reveals ligand substituent sensitive Ru(III) → Ru(II) reduction and Ru(III) → Ru(IV) oxidation in the potential ranges −0.27 to −0.36 V and 0.94–1.13 V (vs. Ag/AgCl), respectively.
在甲醇中,[Ru(PPh 3)3 Cl 2 ],1-萘醛4- R-苯甲酰肼(H 2 nabh R,其中R = H,Me,OMe,Cl和NO 2)与NaOAc的反应为1:1 :2摩尔比可提供通式为反式-[Ru(nabh R)(PPh 3)2 Cl]的邻金属化钌(III)配合物(1 – 5)以50-58%的收益率。元素分析,磁化率,光谱(IR,UV-Vis和EPR)和循环伏安法测量了复合物的特性。1(R = H),2(R = Me)和5(R = NO 2)的单晶X射线结构显示了nabh R 2-的钳状配位模式。1-萘基邻-C,甲亚胺-N和酰胺基-O供体nabh R 2-,两个相互反式的PPh 3和氯化物组成了扭曲的八面体反式-CNOClP 2。三价金属中心周围的配位球。在电子光谱,二氯甲烷溶液1 - 5 506-272纳米范围内,由于配位体与金属的电荷转移和intraligand过渡显