Acta Crystallographica Section C

Structural Chemistry

Volume 70, Part 3 (March 2014)


metal-organic compounds



ov3045 scheme

Acta Cryst. (2014). C70, 312-314    [ doi:10.1107/S2053229614003349 ]

Masking of Lewis acidity trends in the solid-state structures of tri­chlorido- and tri­bromido­(2,2':6',2''-terpyridine-[kappa]3N,N',N'')gallium(III)

I. V. Kazakov, M. Bodensteiner and A. Y. Timoshkin

Abstract: The mol­ecular structures of tri­chlorido­(2,2':6',2''-terpyridine-[kappa]3N,N',N'')gallium(III), [GaCl3(C15H11N3)], and tri­bromido­(2,2':6',2''-terpyridine-[kappa]3N,N',N'')gallium(III), [GaBr3(C15H11N3)], are isostructural, with the GaIII 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.

CCDC references: 972180 and 972181

Formula: [GaCl3(C15H11N3)] and [GaBr3(C15H11N3)]

Keywords: crystal structure; tri­bromido­gallium(III); tri­chlorido­gallium(III); 2,2':6',2''-terpyridine; solid-state structures.


hkldisplay filedownload file

Structure factor file (CIF format) (281.3 kbytes)
[ doi:10.1107/S2053229614003349/ov3045GaCl3_Terpysup2.hkl ]
Contains datablock GaCl3_Terpy


hkldisplay filedownload file

Structure factor file (CIF format) (161.3 kbytes)
[ doi:10.1107/S2053229614003349/ov3045GaBr3_Terpysup3.hkl ]
Contains datablock GaBr3_Terpy


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