Dioxotungsten(VI) Complexes of ONO Donor Ligands and the X-Ray Crystal Structure of [WO<sub>2</sub>(<i>o</i>-OC<sub>6</sub>H<sub>4</sub>CH=NN=C(O)C<sub>6</sub>H<sub>5</sub>)(MeOH)]·MeOH
作者:Mannar R. Maurya、Deena C. Antony、Sarada Gopinathan、Vedavati G. Puranik、Sudam S. Tavale、Changaramponnath Gopinathan
DOI:10.1246/bcsj.68.2847
日期:1995.10
A general method for the preparation of dioxotungsten(VI) complexes of the type [WO2L(MeOH)] (where LH2 = the Schiff’s base derived from salicylaldehyde or o-vanillin and benzoylhydrazide, salicylhydrazide, furoylhydrazide, and isonicotinoylhydrazide) using [WO2(acac)2] (acacH = acetylacetone) as a precursor, is described. These complexes have been characterized by elemental analysis, electrical conductance, IR, electronic, and NMR spectral, electrochemical, and magnetic susceptibility measurements. The structure of [WO2(o-C6H4CH=NN=C(O)C6H5)(MeOH)]·MeOH (1a·MeOH) has been determined by single-crystal X-ray diffraction analysis. 1a·MeOH crystallizes in the space group Pbc21 with a = 6.992(2), b = 16.190(2), c = 31.390(4) Å, V = 3553.4(12) Å3, Z = 8, RF = 0.050, and Rw = 0.054. The tungsten atom has a highly distorted octahedral coordination in which anionic oxygen atoms of the tridentate ligand are mutually trans and are cis to the cis-dioxo group.
本文报道了一种制备二氧钨(VI)配合物[WO2L(MeOH)]的通用方法,其中LH2是水杨醛、邻香草醛与苯甲酰肼、水杨酰肼、糠酰肼和异烟酰肼衍生得到的希夫碱;并以[WO2(acac)2](acacH=乙酰丙酮)为前体。这些配合物通过元素分析、电导率、红外、电子、核磁共振、电化学和磁化率测量进行了表征。通过单晶X射线衍射分析确定了[WO2(邻C6H4CH=NN=C(O)C6H5)(MeOH)]·MeOH(1a·MeOH)的结构。1a·MeOH在空间群Pbc21中结晶,其中a=6.992(2) Å,b=16.190(2) Å,c=31.390(4) Å,V=3553.4(12) Å3,Z=8,RF=0.050,Rw=0.054。钨原子具有高度扭曲的八面体配位,其中三齿配体的阴离子氧原子相互反式,并与顺式二氧基团处于顺式。