二硫纶联吡啶过渡金属配合物的红外光谱与配位方式

INFRARED SPECTRA AND COORDINATION MODE OF TRANSITION MEMTAL COMPLEXES WITH LIGAND DICYANODITHIOLENE AND BIPYRIDINE

详细报道了二硫纶联吡啶过渡金属配合物Ｍ（ｍｎｔ）（ｂｐｙ），Ｍ＝Ｍｎ（Ⅱ）、Ｆｅ（Ⅱ）、Ｃｏ（Ⅱ）、Ｎｉ（Ⅱ）、Ｃｕ（Ⅱ）、Ｚｎ（Ⅱ）的红外光谱实验数据．对比二硫纶二甲基联吡啶金属配合物Ｍ（ｍｎｔ）（ｄｍｂｐｙ）和二硫纶邻菲咯啉金属配合物Ｍ（ｍｎｔ）（ｐｈｅｎ）的红外光谱，分析了Ｍ（ｍｎｔ）（ｂｐｙ）的简正坐标，并结合热谱。

The experimental data of intermediate and far infrared of the title complexes M(mnt)(bpy), M=Mn(Ⅱ), Fe(Ⅱ),Co(Ⅱ),Ni(Ⅱ),Cu(Ⅱ),Zn(Ⅱ),have been in detail given from 4 000 to 400 cm -1 and 500 to 100 cm -1 in the present work. Normal Coordinate Analyses (NCA) on these complixes were studied with the molecular symmetry group C 2V and C 2 (approximate with symetry group C 2V ) . Band assignments for 81 Infrared and Raman active viberations was obtained. Combined with DTA TG and electronic spectra, the coordination mode of the transition memtal complexes with ligand dicyanodithiolene and bipyridine was studied . Compared with the complexes Cu(bpy)Cl 2 the bonds C=C,C=N streching frequences or band strength in complexes MLL are decreased in different degrees because of the conjugated feedback bond MπL (mnt 2- ). Several bands between 470 and 411 cm -1 are associated with M-S stretching modes,384and293cm -1 are associated with M-N stretching modes. The M-S bond is slightly stronger than the M-N bond.