Synthesis and X-ray crystal structure of the first dinuclear 1,1,2-tris(pyrazol-1-yl)ethene–zinc chloride complex
摘要:
Complexes of 1,1,2-tris(pyrazol-1-yl)ethene (Pz(3)) with zinc(II), cadmium and mercury(II) ions were prepared and characterized by IR spectroscopy. Cadmium and mercury(II) complexes are insoluble solids of polymeric structure, while zinc complex is a discrete dinuclear complex (Pz(3))(2)Zn2Cl4, the structure of which was determined by X-ray crystallography. Zinc complex contains five- and four-coordinated PzN(4)Cl and PzNCl(3) zinc centers. Two Pz(3) ligands in the complex are unequivalent, one of them is coordinated by two zinc centers in a bridging mode, while the other is a terminal ligand linked to only one of zinc ions. (C) 2011 Elsevier Ltd. All rights reserved.
研究了吡唑与1,1,2,2-四溴乙烷在超碱性介质二甲亚砜-氢氧化钾中的反应,并鉴定了同时进行取代和消除反应的吡唑基和溴取代乙烯。使用不同的试剂摩尔比进行反应,可以选择性地分离Z 1,2-双(吡唑-1-基)乙烯,1,1,2-三(吡唑-1-基)乙烷和1,1, 2,2-四(吡唑-1-基)乙烷。使用X射线衍射法建立了{ Z -1,2-双(吡唑-1-基)乙烯}二氯锌的晶体结构。J.杂环化学。(2011)。
Alcohol activation by [Ir(COD)(tris(pyrazol-1-yl)methane)]+ and [Ir(COD) (tris(pyrazol-1-yl)ethanel+ cations: formation of alkoxycarbonyl derivatives [(tpzm)IrH(CO2R′)(CO)]+ and [(tpze)IrH(CO2R′)]+ (R′ = Me, Et, i-Pr)
作者:Miguel A. Esteruelas、Luis A. Oro、Rosa M. Claramunt、Concepcíon López、José Luis Lavandera、José Elguero
DOI:10.1016/0022-328x(89)87330-9
日期:1989.4
The reactions of iridium and rhodium complexes derived from tris(pyrazolyl)-methane (tpzm) and tris(pyrazolyl)ethane (tpze) have been examined. One of the most interesting reactions involves the formation of alkoxycarbonyl derivatives of iridium tris(pyrazolyl)alkanes from carbon monoxide and alcohols. In the case of rhodium derivatives, a dimer of formula [(tpzm)]2Rh2(CO)3](CIO42 has been obtained