Mostafa M Amini, Yousef Fazaeli, Gholamhossein Mohammadnezhad, Hamid Reza Khavasi

2015/6/5

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy

144

192-199

Elsevier

Abstract Reactions between niobium ethoxide and 8-hydroxy-2-methylquinoline or 5-chloro-
8-hydroxyquinoline have been explored. Two new tetranuclear heteroleptic niobium
complexes containing oxo, ethoxo, and quinolinate chelate rings have been synthesized
and characterized by 1 H, 13 C and 93 Nb NMR, UV–Vis, and FT-IR spectroscopies, and
single-crystal X-ray diffraction. The molecular structures of the niobium complexes,[Nb 4 (μ-
O) 4 (μ-OEt) 2 (ONC 10 H 8) 2 (OEt) 8](I) and [Nb 4 (μ-O) 4 (μ-OEt) 2 (ONC 9 H 5 Cl) 2 (OEt ...