Complexes of cis-dioxomolybdenum(VI) with a chiral tetradentate tripodal-like ligand system: Syntheses, structures and catalytic activities
作者:Sabari Ghosh、Sathish Kumar Kurapati、Samudranil Pal
DOI:10.1016/j.poly.2016.08.025
日期:2017.3
In each complex, the chiral (bzacL n ) 2− acts as a tetradentate, N 2 O 2 -donor, tripodal-like ligand system and along with the two mutually cis oxo groups forms a distorted octahedral N 2 O 4 coordination environment around the molybdenum(VI) center. All four complexes are diamagnetic and non-electrolytic. The infrared spectra are generally consistent with the structural formulas of 1 – 4 . The electronic
摘要通式为顺式-[MoO 2(bzacL n)](1-4)(H 2 bzacL n = 2-((4 / 5-R-2-羟基苯基氨基)(吡啶-2-基)甲基)的外消旋配合物)-1-苯基丁烷-1,3-二酮,其中R = H,5-Me,5-Cl和4-Me分别为n = 1-4,2Hs表示可解离的酚质子和活性叔CH质子)通过使[MoO 2(bzac)2](Hbzac =苯甲酰丙酮)与潜在的N 2 O-给体5,5元稠合的螯合环反应形成Schiff碱4 / 5-R-2,可以合成75-82%的产率在热甲醇中的-(2-吡啶基亚胺基)酚(HL n;对于R = H,4-Me,4-Cl和5-Me分别为n = 1-4)。1-4中的手性配体系统(bzacL n)2−是通过金属辅助将Mannich型苯甲酰丙酮酸次甲基添加到HL n的甲亚胺片段中而形成的。所有四种复合物均已通过元素(CHN)分析进行了表征,溶液电导率,磁化率,