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Synthesis and structures of lithium salts of two cluster iodoarsenate(III)s and a periodohexaantimonate(III) by Peter B. Hitchcock; Michael F. Lappert; Gang Li is a Chemistry article available to read on EtoBox.

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Treatment of the lithium b-diketiminate Li[{N(C 6 H 3 Pr i 2 -2,6)C(Me)} 2 CH] with an equivalent portion of arsenic(III) iodide unexpectedly afforded [Li(thf) 4 ] 2 [As 8 I 26 ] (1) in modest yield. Another new cluster anion featured in [Li(thf) 4 ] 2 [Li(thf) 6 ][As 7 I 24 ]Á1.5(thf) (2) was obtained in excellent yield from lithium iodide and four equivalents of AsI 3 in thf. Using the same stoichiometry and solvent, but with SbI 3 in place of AsI 3 , furnished in good yield [Li(thf) 4 ] 4 [Sb 6 I 22 ]Á2(thf) (3). The structures of the new crystalline orange (1, 3) or orange/red (2) salts was established by single crystal X-ray diffraction. Each anion of 1-3 may be factorised into respectively [(AsI 2 ) 6 (AsI) 2 (l 2 -I) 10 (l 5 -I) 2 ] 2À (1), [{(AsI 2 )(l 2 -I)(l 3 -I)} 6 As] 3À (2) and [(SbI 3 ) 2 (S-bI 2 ) 2 (SbI) 2 (l 2 -I) 6 (l 3 -I) 4 ] 4À (3). Each As atom in 2 and each Sb atom in 3 is the centre of a sixcoordinate distorted octahedron, while the arsenic atoms in 1 have either four-or six-coordinate environments.

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Author

Peter B. Hitchcock; Michael F. Lappert; Gang Li

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0020-1693)

Published

2010

Language

EN

Field

Chemistry (Physical Sciences)