Issue 30, 2011

Anhydrous mono- and dinuclear tris(quinolinolate) complexes of scandium: the missing structures of rare earth metal 8-quinolinolates

Abstract

The first monomeric anhydrous scandium tris(8-quinolinolate) complex 1 with the 2-amino-8-quinolinolate ligands and the Sc2Q6 dinuclear complex 2 with the unsubstituted 8-quinolinolate ligands have been synthesized and characterized by X-ray analysis and DFT calculations. The intramolecular hydrogen bonds appear to be responsible for the unique monomeric structure of complex 1. The DFT-based analysis of the electron density topology reveals the (3,−1) critical points corresponding to the O⋯H and N⋯H bonds. The two scandium atoms in compound 2 are inequivalent due to different ligand surroundings. They are coordinated by seven (5O, 2N) and eight (4O, 4N) ligand atoms. The increase in the coordination number is accompanied by a decrease in the positive charge of the metal atom as evidenced by the DFT calculations.

Graphical abstract: Anhydrous mono- and dinuclear tris(quinolinolate) complexes of scandium: the missing structures of rare earth metal 8-quinolinolates

Supplementary files

Article information

Article type
Paper
Submitted
24 Feb 2011
Accepted
07 Apr 2011
First published
16 May 2011

Dalton Trans., 2011,40, 7713-7717

Anhydrous mono- and dinuclear tris(quinolinolate) complexes of scandium: the missing structures of rare earth metal 8-quinolinolates

M. A. Katkova, T. V. Balashova, A. P. Pushkarev, I. Yu. Ilyin, G. K. Fukin, E. V. Baranov, S. Yu. Ketkov and M. N. Bochkarev, Dalton Trans., 2011, 40, 7713 DOI: 10.1039/C1DT10318K

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