Synthesis, characterization and crystal structure of racemic vanadyl and uranyl salen-type complexes

Author(s)

Mello, Lucas dos S. ^[1] ; da Cruz Jr, Jose W. ; Bucalon, Daniel H. ^[2] ; Romera, Sandra ^[1] ; dos Santos, Mirian P. ^[3] ; Liao, Luciano M. ^[4] ; Vizotto, Luciana ^[1] ; Martins, Felipe T. ^[4] ; Dockal, Edward Ralph ^[1]

Affiliation

^[1] Univ Fed Sao Carlos, Dept Quim, UFSCar, Rod Washington Luiz, Km 235, Sao Carlos, SP - Brazil

^[2] Univ Sao Paulo, Inst Quim Sao Carlos, Ave Trabalhador Sao Carlense, Sao Carlos, SP - Brazil

^[3] Univ Estadual Paulista UNESP, Campus Sao Joao da Boa Vista, Sao Joao Da Boa Vista, SP - Brazil

^[4] Univ Fed Goias, Inst Quim, BR-74690900 Goiania, Go - Brazil

• Document type: Journal article
• Source: Journal of Molecular Structure; v. 1228, MAR 15 2021.
• Web of Science Citations: 2

Abstract

Synthesis, characterization and crystal structure for racemic ONNO Schiff base ligand 3-OMe-t-salcn (trans-N,N'-bis(3-methoxysalicylidene)-1,2-cyclohexanediamine) and its vanadyl and uranyl complexes are reported. Both complexes were mononuclear, with the Schiff base ligand occupying equatorial coordination sites and the oxo ligands occupying apical positions. Crystal structures were solved in P2(1)/n and P2(1)/c space groups for uranyl and vanadyl complexes, respectively, presenting both (R,R) and (S,S) enantiomers in 1:1 ratio in the same packing unit, which also contain three water molecules. Vibrational, electronic and nuclear magnetic resonance spectroscopies were recorded and are discussed. Gaussian analysis was conducted in order to help electronic spectral attribution. (C) 2020 Elsevier B.V. All rights reserved. (AU)

• FAPESP's process: 15/06392-3 - Cu(II)/Co(III), Cu(II)/Fe(III) and Cu(II)/Ni(II) bimetallic complexes containing Schiff bases: potential catalyzers on the oxidation of catechols
• Grantee: Edward Ralph Dockal
• Support Opportunities: Regular Research Grants