36931-46-1Relevant academic research and scientific papers
A series of 3d metal complexes prepared by in situ reactions of a flexible diacylhydrazine ligand: synthesis, structures and magnetic properties
Wang, Kai,Chen, Zi-Lu,Zou, Hua-Hong,Li, Yan,Liang, Fu-Pei
, p. 17 - 23 (2017)
The coordination reactions of 3d metal salts with malonic acid N,N′-bis(salicyloyl) bishydrazide (H6mbshz) afforded three complexes, namely [Cu2(H2bshz)(Py)4Cl2]·Py (1) (Py?=?pyridine), [Fe2(bshz)(Py)2] (2) and the known complex [Ni4(aehba)2(DMF)2(H2O)2]·2DMF (3), where bshz?=?N,N′-bis(salicyloyl)hydrazine anion and aehba4??=?azo-enolic-2-hydroxybenzamide anion. The X-ray crystal structures of all three complexes have been obtained. Complexes 1 and 2 are composed of N–N-bridged binuclear units, while complex 3 displays a planar tetranuclear structure in which four Ni(II) centers are linked together by N–N and N=N bonds. The bshz anions in 1 and 2 and aehba4? anions in 3 were all generated in situ from H6mbshz. A mechanism for these reactions is proposed, involving tandem C–N cleavage and C–N/N–N coupling processes via free radical intermediates. Magnetic investigations revealed dominant antiferromagnetic interactions between the metallic centers of each complex.
Bis-salicyloyl-dicarboxylic acid dihydrazides as stabilizers for polyolefines
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, (2008/06/13)
New bis-salicyloyl-dicarboxylic acid dihydrazides are stabilizers for polyolefines. They are prepared by reacting a salicylic acid hydrazide with a dicarboxylic acid chloride or a dicarboxylic acid diester.
