Synthesis and spectroscopic studies of some new organometallic chelates derived from bidentate ligands
作者:KIRAN SINGH、PARVESH PURI
DOI:10.3906/kim-0912-354
日期:——
A series of organosilicon(IV) and organotin(IV) complexes having the formulae R_2MCl(L^1), R_2MCl(L^2), R_2MCl(L^3), R_2MCl(L^4), R_2M(L^1)_2, R_2M(L^2)_2, R_2M(L^3)_2, and R_2M(L^4)_2, where M = Si and Sn, and R = CH_3, were synthesized with Schiff bases 5-mercapto-4-(pyridine-2-carboxalideneamino)-s-triazole (HL^1), 4-(furfuralideneamino)-5mercapto-s-triazole (HL^2), 4-(2-chlorobenzylideneamino)-5-mercapto-s-triazole (HL^3), and 4-(4-flourobenzylideneamino)-5-mercapto-s-triazole (HL^4). These complexes were characterized by elemental analysis, molar conductance, and spectroscopic studies, including UV, IR, ^1H, ^13}C, ^29}Si, and ^119}Sn NMR spectroscopy. On the basis of these studies, the resulting complexes are proposed to have trigonal bipyramidal and octahedral geometries.
以 5-巯基-4-(吡啶-2-甲脒基)-s-三唑 (HL^1)、4-(糠醛基)-s-三唑 (HL^2)、4-(糠醛基)-s-三唑 (HL^3)、R_2M(L^1)_2、R_2M(L^2)_2、R_2M(L^3)_2 和 R_2M(L^4)_2(其中 M = Si 和 Sn,R = CH_3)为席夫碱,合成了一系列有机硅(IV)和有机锡(IV)配合物、与希夫碱 5-巯基-4-(吡啶-2-甲脒基氨基)-s-三唑 (HL^1)、4-(糠醛基氨基)-5-巯基-s-三唑 (HL^2)、4-(2-氯亚苄基氨基)-5-巯基-s-三唑 (HL^3) 和 4-(4-氟亚苄基氨基)-5-巯基-s-三唑 (HL^4) 合成。 通过元素分析、摩尔电导率和光谱研究(包括紫外光谱、红外光谱、^1H 光谱、^13}C 光谱、^29}Si 光谱和 ^119}Sn NMR 光谱)对这些复合物进行了表征。 在这些研究的基础上,提出了所得到的配合物具有三叉双锥体和八面体的几何结构。