Periodates and periodato-complexes of aluminium, gallium and indium
Periodates and periodato-complexes of aluminium, gallium and indium
Crystallisation of aluminium or gallium salts with periodic acid at low pH forms [M(H2O)6][IO2(OH)4]3 (M = Al or Ga) which have by characterised by elemental analysis, IR, MAS NMR spectroscopy and X-ray crystallography. Single crystal studies on both revealed disordered structures. The compound [Ga(H2O)6][IO2(OH)4]3 has also been characterised by gallium and iodine K-edge EXAFS studies. Indium(III) nitrate and H5IO6 at pH < 1 produced crystalline H11I2InO14 which contains indium(III) bound to two trans H2O ligands and two chelating [H2I2O10]4- groups, the latter bridging neighbouring indiums to produce an infinite chain. This is the first example of I2O10 groups functioning as chelates and co-ordination is via vertex- rather than the usual edge-linking. At higher pH, gallium and indium produced amorphous insoluble materials of composition M5(IO6)3·nH2O (M = Ga or In) and H3In4(IO6)3·nH2O. Multi-edge EXAFS studies showed that these have structures based upon edge-shared MO6 and IO6 groups and it is proposed that they are Anderson type heteropolyanions A[M4(IO6)3(H2O) 6]·nH2O (A = H3, M = In; A and M = Ga or In). The solution behaviour of these three metals in periodate media has been probed by 27Al, 71Ga and 115In NMR spectroscopy, and thermal decomposition of the solid periodate compounds explored by a combination of TGA, IR spectroscopy and PXRD.
3463-3471
Hector, Andrew L.
f19a8f31-b37f-4474-b32a-b7cf05b9f0e5
Levason, William
e7f6d7c7-643c-49f5-8b57-0ebbe1bb52cd
Webster, Michael
f26c6e36-cb2e-486e-b2ed-b0d25a3a71f7
21 October 1998
Hector, Andrew L.
f19a8f31-b37f-4474-b32a-b7cf05b9f0e5
Levason, William
e7f6d7c7-643c-49f5-8b57-0ebbe1bb52cd
Webster, Michael
f26c6e36-cb2e-486e-b2ed-b0d25a3a71f7
Hector, Andrew L., Levason, William and Webster, Michael
(1998)
Periodates and periodato-complexes of aluminium, gallium and indium.
Journal of the Chemical Society - Dalton Transactions, (20), .
(doi:10.1039/a805469j).
Abstract
Crystallisation of aluminium or gallium salts with periodic acid at low pH forms [M(H2O)6][IO2(OH)4]3 (M = Al or Ga) which have by characterised by elemental analysis, IR, MAS NMR spectroscopy and X-ray crystallography. Single crystal studies on both revealed disordered structures. The compound [Ga(H2O)6][IO2(OH)4]3 has also been characterised by gallium and iodine K-edge EXAFS studies. Indium(III) nitrate and H5IO6 at pH < 1 produced crystalline H11I2InO14 which contains indium(III) bound to two trans H2O ligands and two chelating [H2I2O10]4- groups, the latter bridging neighbouring indiums to produce an infinite chain. This is the first example of I2O10 groups functioning as chelates and co-ordination is via vertex- rather than the usual edge-linking. At higher pH, gallium and indium produced amorphous insoluble materials of composition M5(IO6)3·nH2O (M = Ga or In) and H3In4(IO6)3·nH2O. Multi-edge EXAFS studies showed that these have structures based upon edge-shared MO6 and IO6 groups and it is proposed that they are Anderson type heteropolyanions A[M4(IO6)3(H2O) 6]·nH2O (A = H3, M = In; A and M = Ga or In). The solution behaviour of these three metals in periodate media has been probed by 27Al, 71Ga and 115In NMR spectroscopy, and thermal decomposition of the solid periodate compounds explored by a combination of TGA, IR spectroscopy and PXRD.
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Published date: 21 October 1998
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Local EPrints ID: 491739
URI: http://eprints.soton.ac.uk/id/eprint/491739
ISSN: 0300-9246
PURE UUID: 190413f6-ba7e-4202-8ca2-51524ddfefe3
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Date deposited: 03 Jul 2024 16:59
Last modified: 11 Jul 2024 01:37
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Author:
Michael Webster
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