Vanadium(IV) complexes of Mandelic acid

IF 2.6 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Polyhedron Pub Date : 2025-10-09 DOI:10.1016/j.poly.2025.117815

Peter Schwendt , Róbert Gyepes , Jozef Tatiersky , Ján Šimunek , Irena Matulková

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引用次数: 0

Abstract

The first structurally characterized vanadium(IV) mandelato complexes [V₂O₂(S-mand)₂(bpy)₂]·H₂O·CH₃CN (11), [V₂O₂(R-mand)(S-mand)(bpy)₂]·4H₂O (12), [V₂O₂(S-mand)₂(phen)₂]·2CH₃CN (13), [V₂O₂(R-mand)(S-mand)(phen)₂]·2CH₃CN (14) (mand²⁻ – mandelato ligand, bpy – 2,2′-bipyridine, phen – 1,10-phenanthroline) have been prepared by the reduction of NMe₄VO₃ by an excess of mandelic acid in the presence of bpy (phen) and in CH₃CN/H₂O (1/1 vol. ratio) solvent. The single crystal X-ray diffraction studies of the complexes revealed the presence of molecular complexes with alkoxy oxygen atoms of mandelato ligands acting as bridging atoms linking the vanadium atoms and distorted octahedral coordination environment around vanadium atoms. The compounds were further characterized by IR and Raman spectroscopies. The band assignment was corroborated by DFT calculation. The course of reduction vanadium(V) to vanadium(IV) was monitored by UV–vis spectroscopy.

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扁桃酸钒（IV）配合物

用过量的桃酸还原NMe4VO3，在bpy （phen）存在和CH3CN/H2O（体积比为1/1）的溶剂中制备了具有结构表征的钒（IV）桃核苷配合物[V2O2(S-mand) (S-mand)(bpy)2]·H2O·CH3CN（11）、[V2O2(R-mand)(S-mand)(bpy)2]·2CH3CN（12）、[V2O2(S-mand)2(phen)2]·2CH3CN (14) （man2−-桃核苷配体，bpy - 2,2′-联吡啶，phen - 1,10-菲罗啉）。对配合物的单晶x射线衍射研究表明，配合物中存在以mandelato配体的烷氧氧原子为桥接原子连接钒原子的分子配合物和钒原子周围扭曲的八面体配位环境。用红外光谱和拉曼光谱进一步对化合物进行了表征。通过DFT计算证实了波段分配。紫外-可见光谱法监测了钒(V)还原为钒（IV）的过程。

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来源期刊

Polyhedron 化学-晶体学

CiteScore

4.90

自引率

7.70%

发文量

515

审稿时长

2 months

期刊介绍： Polyhedron publishes original, fundamental, experimental and theoretical work of the highest quality in all the major areas of inorganic chemistry. This includes synthetic chemistry, coordination chemistry, organometallic chemistry, bioinorganic chemistry, and solid-state and materials chemistry. Papers should be significant pieces of work, and all new compounds must be appropriately characterized. The inclusion of single-crystal X-ray structural data is strongly encouraged, but papers reporting only the X-ray structure determination of a single compound will usually not be considered. Papers on solid-state or materials chemistry will be expected to have a significant molecular chemistry component (such as the synthesis and characterization of the molecular precursors and/or a systematic study of the use of different precursors or reaction conditions) or demonstrate a cutting-edge application (for example inorganic materials for energy applications). Papers dealing only with stability constants are not considered.