Ternary complexes of palladium(II) containing (Te,S) and (Te,N) hybrid organotellurium ligands: synthesis, spectra and cis-trans isomeric conversion
摘要:
Five ternary complexes of palladium(II) namely [Pd(L(1))(2)](ClO4)(2) (1), [Pd(L(1))(L(2))](ClO4)(2) (2), [(PPh(3))(2)Pd(L(1))](ClO4)(2) (3), [(DppE)Pd(L(2))](ClO4)(2) (4) and [Pd(L(1))(L(3))](ClO4)(2) (5) where L(1) = MeSCH(2)CH(2)TeAr, L(2) = Me(2)NCH(2)CH(2)TeAr (Ar = 4-MeOC(6)H(4)) and L(3) = MeSCH(2)CH(OH)CH(2)SMe were synthesized by treating [PdCl2 . (L(1))] or [(PPh(3))(2)/(DPPE)PdCl2)] with AgClO4 and the appropriate ligand. The ligands L(1), L(2) and L(3) in these complexes are judged to be coordinated in bidentate mode on the basis of (1)HNMR and IR spectral data. All the complexes behave as 1:2 electrolytes in CH3CN. The Te-125(H-1) NMR spectra of 1 and 2 indicate that the ligands L(1) and L(2) in them are in a cis disposition in fleshly prepared dimethylsulphoxide-d(6)-CD3CN solutions, implying a similar configuration in the solid state but within a few hours there is partial conversion into the trans isomer.
九个新的潜在多齿有机碲的混合配位体,即二(2-氨基乙基)碲化物和二碲化物(1,3),双(2-二甲氨基乙基)碲化物和二碲化物(2,4),2-(二甲氨基)乙基碲化的芳基(5) ,2-甲氧基乙基芳基碲化物(6),双(2-芳基碲乙基)醚(7),1,2-双(2-芳基碲乙氧基)乙烷(8)和N,N,N',N'-四(2-)芳基碲乙基)乙烷-1,2-二胺(9),(其中芳基= 4-MeO-C 6 H 4),是由Na 2 Te / Na 2 Te 2或ArTe - Na +与适当的有机卤化物反应制得的,产率为60-85%。化合物6–8不能储存超过一周,并经过空气氧化生成R 2 TeO。所有化合物1–9均已通过分子量测定,元素分析,1 H NMR和13 C { 1 H}光谱进行了表征。