title: Masking of Lewis acidity trends in the solid-state structures of trichlorido- and tribromido(2,2':6',2''-terpyridine-κ(3)N,N',N'')gallium(III).
abstract: The molecular structures of trichlorido(2,2':6',2''-terpyridine-κ(3)N,N',N'')gallium(III), [GaCl3(C15H11N3)], and tribromido(2,2':6',2''-terpyridine-κ(3)N,N',N'')gallium(III), [GaBr3(C15H11N3)], are isostructural, with the Ga(III) atom displaying an octahedral geometry. It is shown that the Ga-N distances in the two complexes are the same within experimental error, in contrast to expected bond lengthening in the bromide complex due to the lower Lewis acidity of GaBr3. Thus, masking of the Lewis acidity trends in the solid state is observed not only for complexes of group 13 metal halides with monodentate ligands but for complexes with the polydentate 2,2':6',2''-terpyridine donor as well.
authors.affiliation: Department of Chemistry, Saint-Petersburg State University, Universitetskiy pr. 26, Old Peterhof, 198504 St Petersburg, Russian Federation.
authors.forename: Igor V
authors.initials: IV
authors.lastname: Kazakov
authors.affiliation: Faculty of Chemistry and Pharmacy, University of Regensburg, Universitätsstraβe 31, 93053 Regensburg, Germany.
authors.forename: Michael
authors.initials: M
authors.lastname: Bodensteiner
authors.affiliation: Department of Chemistry, Saint-Petersburg State University, Universitetskiy pr. 26, Old Peterhof, 198504 St Petersburg, Russian Federation.
authors.forename: Alexey Y
authors.initials: AY
authors.lastname: Timoshkin
mesh_terms: D056831:Coordination Complexes / Q000737:chemistry*; D018360:Crystallography, X-Ray; D005708:Gallium / Q000737:chemistry*; D058116:Lewis Acids / Q000737:chemistry*; D008024:Ligands; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure
chemical_list: D056831:Coordination Complexes; D058116:Lewis Acids; D008024:Ligands; C000589789:tribromido(2,2'-6',2'-terpyridine-kappa(3)N,N',N')gallium; C000589788:trichlorido(2,2'-6',2'-terpyridine-kappa(3)N,N',N')gallium(III); D005708:Gallium
keywords: 2,2′:6′,2′′-terpyridine; crystal structure; solid-state structures; tribromidogallium(III); trichloridogallium(III)