Synthesis, spectroscopic properties and structural characterisation of Pd(II) and Pt(II) complexes with 1,3,5-pyrazole derived ligands. Rotation around the metal–N bond
作者:Vanessa Montoya、Josefina Pons、Xavier Solans、Mercè Font-bardia、Josep Ros
DOI:10.1016/j.ica.2004.12.060
日期:2005.4
[PdCl 2 (CH 3 CN) 2 and K 2 PtCl 4 gave complexes trans -[MCl 2 ( L ) 2 ] (L = L 1 , L 2 ). The new complexes were characterised by elemental analyses, conductivity measurements, infrared, 1 H and 13 C 1 H} NMR spectroscopies and X-ray diffraction. The NMR study of the complex [PdCl 2 ( L 1 ) 2 ], in CDCl 3 solution, is consistent with a very slow rotation of ligands around the Pd–N bond, so that
摘要配体1-乙基-5-甲基-3-苯基-1H-吡唑(L 1)和5-甲基-1-辛基-3-苯基-1H-吡唑(L 2)与[PdCl 2(CH 3) CN)2和K 2 PtCl 4得到反式-[MCl 2(L)2]的配合物(L = L 1,L 2)。通过元素分析,电导率测量,红外,1 H和13 C 1 H} NMR光谱学和X射线衍射对新配合物进行了表征。在CDCl 3溶液中对[PdCl 2(L 1)2]络合物的NMR研究表明,配体围绕Pd–N键的旋转非常缓慢,因此可以在溶液中观察到两个构象异构体(syn和反对 )。对于络合物[PdCl 2(L 2)2]和[PtCl 2(L)2](L = L 1,L 2),观察到不同的行为,它们在室温下呈溶液形式的异构体(抗)。描述了[PdCl 2(L 1)2]络合物的晶体结构,