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首页> 外文期刊>Polyhedron: The International Journal for Inorganic and Organometallic Chemistry >Synthesis, structure studies and electrochemistry of molybdenum(VI) Schiff base complexes in the presence of different donor solvent molecules
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Synthesis, structure studies and electrochemistry of molybdenum(VI) Schiff base complexes in the presence of different donor solvent molecules

机译：钼（VI）Schiff碱配合物在不同供体溶剂分子存在下的合成，结构研究和电化学

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摘要

The reactions between bis(acetylacetonato)dioxomolybdenum(VI) and Schiff base ligands derived from 5-chlorosalicylaldehyde or 3-ethoxy-salicylaldehye, and 3-methoxy-benzoic hydrazide (m-anisic hydrazide), 2-furoic hydrazide or 2,4-dihydroxy-benzoic hydrazide in the presence of donor solvents yielded cis-dioxomolybdenum(VI) complexes with the general formula MoO_2L(D), where L = tridentate Schiff base ligand and D = dimethylsulfoxide, hexamethylphosphoramide, dimethylformamide, imidazole or methanol. The complexes were characterized by elemental analysis, electronic spectra, IR, ~1H and ~(13)C NMR spectroscopies, thermogravimetric analysis, cyclic voltammetry, and the molecular structures of five of the dioxomolybdenum complexes were elucidated by single crystal X-ray diffractometion studies. In general, the complexes adopt an octahedral environment around the Mo center with a cis-oxo configuration. The other coordination sites are occupied by the imino nitrogen, phenoxyl oxygen, hydroxyl oxygen of the tridentate Schiff base and the donor atom of the solvent molecule. The structural data revealed that the labile coordination site, which is occupied by N or O atoms from the donor solvents, has a longer Mo-O or Mo-N bond distance.
机译：双（乙酰丙酮乙酰基）二氧钼（VI）与衍生自5-氯水杨醛或3-乙氧基水杨醛的Schiff碱配体与3-甲氧基苯甲酰肼（间-茴香酰肼），2-糠酰肼或2,4-的反应在给体溶剂存在下，二羟基苯甲酰肼可制得具有通式MoO_2L（D）的顺式-二氧钼（VI）配合物，其中L =三齿席夫碱配体，D =二甲基亚砜，六甲基磷酰胺，二甲基甲酰胺，咪唑或甲醇。通过元素分析，电子光谱，IR，〜1H和〜（13）C NMR光谱，热重分析，循环伏安法对配合物进行表征，并通过单晶X射线衍射研究阐明了五种二氧钼配合物的分子结构。 。通常，络合物在Mo中心周围采用顺-氧构型的八面体环境。其他配位位点被三齿席夫碱的亚氨基氮，苯氧基氧，羟基氧和溶剂分子的供体原子占据。结构数据表明，不稳定的配位位点（由供体溶剂中的N或O原子占据）具有更长的Mo-O或Mo-N键距。

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