Binuclear Vanadium(V) Complex with the Ligand Based on Isonicotinic Acid Hydrazide and 1-Phenyl-1,3-Butanedione: Synthesis and Crystal Structure

P. Bourosh; Боурош П.; M. Cocu; Коку М.; O. Danilescu; Данилеску О.; I. Bulhac; Булхак И.

doi:10.31857/S0132344X23700196

Binuclear Vanadium(V) Complex with the Ligand Based on Isonicotinic Acid Hydrazide and 1-Phenyl-1,3-Butanedione: Synthesis and Crystal Structure

Authors: Bourosh P.¹, Cocu M.², Danilescu O.², Bulhac I.²
Affiliations:
1. Institute of Applied Physics, MSU, Chisinau, Republic of Moldova
2. Institute of Chemistry, MSU, Chisinau, Republic of Moldova
Issue: Vol 49, No 4 (2023)
Pages: 195-204
Section: Articles
URL: https://ruspoj.com/0132-344X/article/view/667517
DOI: https://doi.org/10.31857/S0132344X23700196
EDN: https://elibrary.ru/CUMNFL
ID: 667517

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Abstract

A new molecular binuclear vanadium(V) complex [VO(L)(OCH3)]2 (I) is synthesized in which ligand H2L is prepared by the reaction of isonicotinic acid hydrazide (INAH, isoniazide) with 1-phenyl-1,3-butanedione. Ligand H2L and complex I are studied by elemental analysis, IR spectroscopy, mass spectrometry, and X-ray diffraction (XRD) (CIF files CCDC nos. 2172124 and 2172125, respectively). The composition and structure of the ligand in the free state is additionally studied by NMR spectroscopy. The bideprotonated organic ligand L2– coordinates to the metal atom via the tridentate mode through a set of donor atoms ONO to form two conjugated metallocycles. Different tautomeric forms are stabilized in H2L and in the corresponding coordinated ligand.

Keywords

vanadium, coordination compound, isonicotinoyl hydrazone, XRD, IR spectroscopy, NMR spectroscopy

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