Issue 22, 2013

Crystallographic and solution NMR structural analyses of four hexacoordinated gallium(iii) complexes based on ligands derived from 6-amino-perhydro-1,4-diazepine

Abstract

The crystal structures are reported of four gallium(III) complexes based on two pairs of 6-substituted-6-amino-perhydro-1,4-diazepine ligands, together with a study of their solution structures examined by 1H and 71Ga NMR spectroscopy. In each case, the ligand adopts a twisted chair conformation that creates a facial array of the three ligand nitrogen atoms. The coordination geometry about each gallium(III) ion is a slightly distorted octahedron, with the 6-phenyl series being slightly more distorted than the 6-methyl analogues. Pulsed NMR experiments allow solution NMR structures to be assessed, revealing good agreement with the solid-state structures.

Graphical abstract: Crystallographic and solution NMR structural analyses of four hexacoordinated gallium(iii) complexes based on ligands derived from 6-amino-perhydro-1,4-diazepine

Supplementary files

Article information

Article type
Paper
Submitted
28 Jan 2013
Accepted
26 Feb 2013
First published
26 Feb 2013

Dalton Trans., 2013,42, 8001-8008

Crystallographic and solution NMR structural analyses of four hexacoordinated gallium(III) complexes based on ligands derived from 6-amino-perhydro-1,4-diazepine

D. Parker, B. P. Waldron and D. S. Yufit, Dalton Trans., 2013, 42, 8001 DOI: 10.1039/C3DT50287B

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