{"title":"Synthesis, Characterization and X-Ray Crystal Structures of 2-Chloro-N'-(2-hydroxy-5-methoxybenzylidene)Benzohydrazide and Its Oxidovanadium(V) Complexes with Catalytic Oxidation Property","authors":"Q. Yang, C. Yang, Y. Lei, Y. Liu, R. Liu","doi":"10.1134/S0022476625010020","DOIUrl":null,"url":null,"abstract":"<p>A new aroylhydrazone compound 2-chloro-<i>N′</i>-(2-hydroxy-5-methoxybenzylidene)benzohydrazide (H<sub>2</sub>L) was synthesized. With the aroylhydrazone compound and 2-hydroxybenzohydroxamic acid (HL<sup>a</sup>) or maltol (HL<sup>b</sup>) as ligands, two new oxidovanadium(V) complexes [VOLL<sup>a</sup>]∙CH<sub>3</sub>OH (<b>1</b>) and [VOLL<sup>b</sup>] (<b>2</b>) were synthesized. Both the aroylhydrazone and the complexes have been characterized by elemental analysis, IR, UV-Vis and <sup>1</sup>H NMR spectra, as well as single crystal X-ray determination. X-ray analysis indicates that the V atoms in the complexes are in octahedral coordination. Crystal structures of H<sub>2</sub>L and the complexes are stabilized by hydrogen bonds. Thermal analysis of the complexes was performed. The complexes show effective catalytic property for the epoxidation of styrene, with conversion over 80% and selectivity over 90%.</p>","PeriodicalId":668,"journal":{"name":"Journal of Structural Chemistry","volume":"66 1","pages":"16 - 29"},"PeriodicalIF":1.2000,"publicationDate":"2025-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Structural Chemistry","FirstCategoryId":"92","ListUrlMain":"https://link.springer.com/article/10.1134/S0022476625010020","RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"CHEMISTRY, INORGANIC & NUCLEAR","Score":null,"Total":0}
引用次数: 0
摘要
合成了一种新的酰基腙化合物 2-氯-N′-(2-羟基-5-甲氧基苯亚甲基)苯腙肼 (H2L)。以甲酰腙化合物和 2-羟基苯羟肟酸（HLa）或麦芽酚（HLb）为配体，合成了两种新的氧化钒（V）配合物 [VOLLa]∙CH3OH (1) 和 [VOLLb] (2)。通过元素分析、红外光谱、紫外可见光谱和 1H NMR 光谱以及单晶 X 射线测定，对甲酰腙和复合物进行了表征。X 射线分析表明，配合物中的 V 原子呈八面体配位。H2L 和配合物的晶体结构通过氢键得以稳定。对配合物进行了热分析。这些配合物对苯乙烯的环氧化反应具有有效的催化性能，转化率超过 80%，选择性超过 90%。
Synthesis, Characterization and X-Ray Crystal Structures of 2-Chloro-N'-(2-hydroxy-5-methoxybenzylidene)Benzohydrazide and Its Oxidovanadium(V) Complexes with Catalytic Oxidation Property
A new aroylhydrazone compound 2-chloro-N′-(2-hydroxy-5-methoxybenzylidene)benzohydrazide (H2L) was synthesized. With the aroylhydrazone compound and 2-hydroxybenzohydroxamic acid (HLa) or maltol (HLb) as ligands, two new oxidovanadium(V) complexes [VOLLa]∙CH3OH (1) and [VOLLb] (2) were synthesized. Both the aroylhydrazone and the complexes have been characterized by elemental analysis, IR, UV-Vis and 1H NMR spectra, as well as single crystal X-ray determination. X-ray analysis indicates that the V atoms in the complexes are in octahedral coordination. Crystal structures of H2L and the complexes are stabilized by hydrogen bonds. Thermal analysis of the complexes was performed. The complexes show effective catalytic property for the epoxidation of styrene, with conversion over 80% and selectivity over 90%.
期刊介绍：
Journal is an interdisciplinary publication covering all aspects of structural chemistry, including the theory of molecular structure and chemical bond; the use of physical methods to study the electronic and spatial structure of chemical species; structural features of liquids, solutions, surfaces, supramolecular systems, nano- and solid materials; and the crystal structure of solids.
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