Structural Characterization of Some Complexes of Group 13 Metal(III) Nitrates with N,N′-Bidentate Bases

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doi:10.1071/CH05267

Structural Characterization of Some Complexes of Group 13 Metal(iii) Nitrates with N,N'-Bidentate Bases

Peter C. Junk ^A ^B ^C, Brian W. Skelton ^A, Allan H. White ^A

^A Chemistry M313, School of Biomedical, Biomolecular and Chemical Sciences, University of Western Australia, Crawley WA 6009, Australia.
^B School of Chemistry, Monash University, Clayton VIC 3800, Australia.
^C Corresponding author. Email: peter.junk@sci.monash.edu.au





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Australian Journal of Chemistry 59(2) 147–154 http://dx.doi.org/10.1071/CH05267
Submitted: 7 October 2005 Accepted: 16 January 2006 Published online: 7 March 2006

Abstract

The structural characterization of several novel complexes of gallium(iii) and indium(iii) nitrates, crystallized with 2,2′-bipyridyl (bpy) and 1,10-phenanthroline (phen) from nitromethane solution, is presented. The adduct In(NO₃)₃:bpy (1:2) is of the form [(ONO₂)(O₂NO)₂In(bpy)₂], rather than [(ONO₂)₃ML₂] as found for the larger M = Ln (rare earth), Bi, despite similar 2-symmetry. Several hydroxo-bridged dimers, [L₂M(OH)₂ML₂](NO₃)₄(·S) are also presented, the cations all of the same isomeric form. [(ONO₂)(bpy)In(OH)₂In(bpy)(O₂NO)], interestingly, displays two different forms within the one crystal, by virtue of different dispositions of the coordinated nitrate. The structures of related cis-[(phen)₂GaBr₂]Br(·S) and [(en)₂In(OH)₂In(en)₂](NO₃)₄ (en = H₂N(CH₂)₂NH₂) are also described, the latter isomorphous with its cobalt(iii) counterpart.