A niobium(V) complex with mixed O,S-donor ligands. Synthesis, structure and properties of the anion tris(2-mercapto-4-methylphenolato)niobate(V)

Reaction of Nb(OEt) 5 with 2-mercapto-4-methylphenol (mmpH 2) in the presence of triethylamine gave the mononuclear tris complex (Et 3NH)[Nb(mmp) 3] which was structurally characterized. The coordination geometry around the niobium is between octahedral and trigonal prismatic, with a twist angle of...

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Bibliographic Details
Published in:Polyhedron 1997, Vol.16 (9), p.1447-1451
Main Authors: Challen, Paul R., Peapus, Diane H., Magnus, Karen A.
Format: Article
Language:English
Subjects:
2-mercapto-4-methylphenol
mercaptophenolate
niobium
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Summary:Reaction of Nb(OEt) 5 with 2-mercapto-4-methylphenol (mmpH 2) in the presence of triethylamine gave the mononuclear tris complex (Et 3NH)[Nb(mmp) 3] which was structurally characterized. The coordination geometry around the niobium is between octahedral and trigonal prismatic, with a twist angle of 41.5°. The mercaptophenolate ligands are arranged around the metal in a “propeller” fashion. (Et 3NH)[Nb(mmp) 3] was characterized by IR, 1H NMR and UV-vis spectroscopies, and cyclic voltammetry. A reversible reduction wave found at −1.03 V is for reduction to the Nb IV complex.
ISSN:0277-5387
DOI:10.1016/S0277-5387(96)00451-2