Coordination of o-benzosemiquinonate, o-iminobenzosemiquinonate, 4,4′-di-tert-butyl-2,2′-bipyridine and 1,10-phenanthroline anion radicals to oxidovanadium(<scp>iv</scp>)
whereas the signals for 2 and 3 are deshielded to +382.4 and +71.8 ppm, respectively. The closed-shell singlet (CSS) solutions of 3 and 5− at the B3LYP/DFT level are unstable and the open-shell singlet (OSS) solutions are 0.5 and 7.3 kcal mol−1 lower in energy, respectively, than the CSS solutions. In 3 and 5− the alpha spin (100%) is localized on the vanadium ion, whereas the beta spin is delocalized across
New di-μ-oxidovanadium(V) complexes with NNO donor Schiff bases: Synthesis, crystal structures and electrochemical studies
作者:R.N. Patel、Yogendra Pratap Singh、Yogendra Singh、Ray J. Butcher、Jerry P. Jasinski
DOI:10.1016/j.poly.2017.05.028
日期:2017.9
atmospheric oxygen spontaneously acted as an oxidizing agent and yielded new (VIV → VV) vanadium(V) complexes. The electronic spectra of 1 and 2 shown the vanadium(V) centre is in a distorted octahedral environment in each case. The complexes were characterized by routine physico-chemical methods. The single crystal X-ray structures of 1 and 2 also revealed a distorted octahedral coordination around each of
Synthesis, crystal structure and DFT calculations of octahedral nickel(II) complexes derived from <i>N</i>′-[(<i>E</i>)-phenyl(pyridin-2-yl)methylidene]benzohydrazide
作者:Ram N. Patel、Yogendra Singh、Yogendra Pratap Singh、Raymond J. Butcher
DOI:10.1080/00958972.2016.1189543
日期:2016.8.2
Abstract The two new nickel(II) complexes, [Ni(HL)(L)](NO3)∙H2O (1) and [Ni(L)2] (2) (where HL/L = N′-[(E)-phenyl(pyridin-2-yl)methylidene]benzohydrazide), have been synthesized and characterized by elemental analysis, spectroscopic, magnetic susceptibility, and cyclic voltammetric measurements. Single-crystal X-ray analysis of [Ni(HL)(L)](NO3)∙H2O (1) and [Ni(L)2] (2) has revealed the presence of
摘要 两种新的镍 (II) 配合物 [Ni(HL)(L)](NO3)∙H2O (1) 和 [Ni(L)2] (2)(其中 HL/L = N'-[(E )-苯基(吡啶-2-基)亚甲基]苯甲酰肼),已通过元素分析、光谱、磁化率和循环伏安测量进行合成和表征。[Ni(HL)(L)](NO3)∙H2O (1) 和 [Ni(L)2] (2) 的单晶 X 射线分析表明镍 (II) 周围存在扭曲的八面体几何形状. X 射线和光谱表征证实了配合物中配体的酮-烯醇形式的存在。配体和配合物的电子结构和光谱特性已通过 DFT 和 TDDFT 计算得到解释。还测量了这些复合物的超氧化物歧化酶活性。
Bacchi, Alessia; Carcelli, Mauro; Costa, Mirco, Journal of the Chemical Society, Dalton Transactions, 1996, # 22, p. 4239 - 4244