Family of Mixed-Valence Oxovanadium(IV/V) Dinuclear Entities Incorporating N<sub>4</sub>O<sub>3</sub>-Coordinating Heptadentate Ligands: Synthesis, Structure, and EPR Spectra
作者:Amrita Mondal、Sumana Sarkar、Deepak Chopra、T. N. Guru Row、Kausikisankar Pramanik、Kajal Krishna Rajak
DOI:10.1021/ic048919x
日期:2005.2.1
ellipsoids of O2, O4, C10, C14, and C15 also suggests a type III complex in the solid state. EPR spectra of solid complexes at 77 K display a single line indicating the localization of the odd electron (3d(xy)1). Valence localization at 77 K is also consistent with the 51V hyperfine structure of the axial EPR spectra (3d(xy)1 ground state) of the complexes in frozen (77 K) dichloromethane solution: S = 1/2,
通式[V2O3L]的双核(V(IV)V(V))氧代苯氧钒酸盐已通过在N2气氛下使丙酮中的双(乙酰丙酮基)氧钒(IV)与H3L在丙酮中以2:1的比例反应,以优异的收率合成。此处L3-是2,6-双[((2-羟基苄基)(N',N'-(二甲基氨基)乙基)}氨基}甲基] -4-甲基苯酚(H3L1),2,6的去质子化形式-双[((5-甲基-2-羟基苄基)(N',N'-(二甲基氨基)乙基)}氨基}甲基] -4-甲基苯酚(H3L2),2,6-双[(叔丁基-2-羟基苄基)(N',N'-(二甲基氨基)乙基)}氨基}甲基] -4-甲基苯酚(H3L3),2,6-双[((5-氯-2-羟基苄基) (N',N'-(二甲基氨基)乙基)氨基}甲基] -4-甲基苯酚(H3L4),2,6-双[((5-溴-2-羟基苄基)(N'N'-(二甲基氨基)乙基)}氨基}甲基] -4-甲基苯酚(H3L5)或2,6-双