排序方式: 共有2条查询结果,搜索用时 0 毫秒
1
1.
Hydrazinium oxydiacetate salts of formulae N2H5(Hoda)⋅H2oda, N2H5(Hoda) and (N2H5)2oda (H2oda=oxydiacetic acid) and complexes of the types, M(oda)⋅2N2H4⋅xH2O (where M=Co, Ni and Cd; x=0 for Co and Ni;x=1 for Cd) and Zn(oda)⋅N2H4⋅H2O have been prepared and characterized by analytical, spectral, thermal and X-ray powder diffraction data. IR data document
the existence of N2H+
5 ion in the simple salts and the bidentate coordination of both hydrazine and dianion in the complexes. Complete decomposition
of hydrazinium salts takes place via oxydiacetic acid intermediate. Cobalt and nickel complexes decompose in a single step,
whereas zinc and cadmium complexes decompose through hydrazinate intermediates. However, all the metal complexes yield metal
oxide as the final residue. Isomorphic nature of the cobalt and nickel complexes is evident from XRD data.
This revised version was published online in August 2006 with corrections to the Cover Date. 相似文献
2.
The uranium complexes of composition,UO2X⋅N2H4⋅H2O, X=succinate or glutarate, UO2X2⋅N2H4⋅H2O, X=Hadipate, Hpimelate, Hsuberate, Hazelate and Hsebacate and UO2X⋅N2H4, where X=malate and oxydiacetate have been prepared and characterized by analytical, spectral (IR and electronic), thermal and X-ray
powder diffraction studies. Hydrazine acts as a monodentate ligand in uranyl succinate, glutarate, malate and oxydiacetate
hydrazinates and bidentate in uranyl adipate, pimelate, suberate, azelate and sebacate hydrazinate hydrate complexes. The
dicarboxylate anions bind the uranium through uni- and bidentate fashion depending upon the coordination polyhedra. All the
dicarboxylate hydrazinate complexes in this series decompose to give U3O8 as the end product through their respective uranyl dicarboxylate intermediates. Malate and oxydiacetate compounds decompose
exothermically in a single step. The coordinated water is confirmed from thermal data. The complexes of succinate to sebacate
seem to possess hexagonal bipyramidal geometry around uranium, whereas pentagonal bipyramidal geometry has been proposed for
both malate and oxydiacetate complexes.
This revised version was published online in August 2006 with corrections to the Cover Date. 相似文献
1