The nature of subvalent gallium and indium in aqueous media
2002 (English)In: Polyhedron, ISSN 0277-5387, Vol. 21, no 5-6, 519-524 p.Article in journal (Refereed) Published
Subvalent gallium can exist in aqueous solutions as Ga-Ga bonded gallium(II) species stabilised by halide ligands in the form of the complex anions Ga2X62- (X = Cl, Br or I) whose formation and reactivity are discussed. Gallium(I) compounds and mixed valence compounds of gallium react vigorously with water, converting any Ga+ ions into Ga(III) products. Indium(I) is more tolerant of water, so that perchlorate and other non-complexing aqueous media can support In+ ions at concentrations up to 10(-3) mol l(-1) before disproportionation to In(0) and In(III) occurs. Subvalent indium concentrations of approximately 10(-1) mol l(-1) are attained in halogen acid solution, particularly HBr which yields red, solid InBr upon dilution. Spectroscopic data suggest the precursor is an In(II)-In(II) bromide complex (probably In2Br62-) capable of breaking up into In(I) and In(III) products.
Place, publisher, year, edition, pages
2002. Vol. 21, no 5-6, 519-524 p.
subvalent indium and gallium, gallium(II), indium(I), indium(II), halide complexes, Raman spectra
IdentifiersURN: urn:nbn:se:kth:diva-5106DOI: 10.1016/S0277-5387(01)01030-0ISI: 000175462300007OAI: oai:DiVA.org:kth-5106DiVA: diva2:7871
QC 201010042005-05-152005-05-152010-10-04Bibliographically approved