8-hydroxyquinoline coordinated vanadium(V) complexes with Schiff bases: Synthesis, characterization, and crystal structures

• Published in: Russian journal of coordination chemistry 2015-04, Vol.41 (4), p.261-266
• Main Authors: Qian, S. S., Huo, Y., Ye, Y. T., You, Z., Zhu, H. L.
• Format: Article
• Language: English
• Subjects: Chemistry; Chemistry and Materials Science; Inorganic Chemistry; Physical Chemistry
• ISSN: 1070-3284; 1608-3318
• DOI: 10.1134/S107032841504003X

Two new 8-hydroxyquinoline coordinated vanadium(V) complexes, [VO(L 1 )(L′)] ( I ) and [VO(L 2 )(L′)] ( II ), where L 1 is the dianionic form of 2-[(2-hydroxyethylimino)methyl]-6-methylphenol (H 2 L 1 ), L 2 is the dianionic form of N ′-(4-oxopentan-2-ylidene)pivalohydrazide (H 2 L 2 ), L′ is the monoanionic form of 8-hydroxyquinoline (HL′), were prepared and characterized by elemental analysis, infrared, UV-Vis and 1 H NMR spectra, and single crystal X-ray diffraction (CIF files CCDC nos. 1012078 ( I ) and 1012077 ( II )). Complex I crystallizes in the monoclinic space group P 2 1 / n with unit cell dimensions a = 16.120(1), b = 6.9952(5), c = 16.128(1) Å, β = 106.948(2)°, V = 1739.6(2) Å 3 , Z = 4, GOOF = 1.127, R 1 = 0.0464 and wR 2 = 0.1172. Complex II crystallizes in the orthorhombic space group Pna 2 1 with unit cell dimensions a = 13.512(2), b = 9.606(1), c = 31.081(4) Å, V = 4034.3(8) Å 3 , Z = 8, GOOF = 1.044, R 1 = 0.0604 and wR 2 = 0.1038. The V atoms in the complexes are in octahedral coordination. Thermal stability of the complexes was studied.