Syntheses and structures of some homoleptic acetonitrile lanthanoid(III) complexes
- 1 January 1998
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc., Dalton Trans.
- No. 22,p. 3887-3892
- https://doi.org/10.1039/a805793a
Abstract
From the reaction of [{Ln(SO2)n(AsF6)3}x] (Ln = La or Sm) with acetonitrile the complexes [Ln(MeCN)9][AsF6]3 have been prepared. The crystal structures of [Ln(MeCN)9][AsF6]3·nMeCN (Ln = La, n = l; Ln = Sm, n = 3) show a nine-co-ordinate lanthanoid with a tricapped trigonal prismatic arrangement of N donor atoms. By reaction of LnCl3 with AlCl3 in acetonitrile the complexes [Ln(MeCN)n][AlCl4]3 (Ln = Pr, n = 9; Ln = Yb, n = 8) have been synthesized, and they have also been prepared very simply by the reaction of the lanthanoid metal, AlCl3, and C2Cl6 in acetonitrile. The crystal structure of [Pr(MeCN)9][AlCl4]3·MeCN shows nine-co-ordinate praseodymium also with a tricapped trigonal prismatic arrangement of N donor atoms, whilst [Yb(MeCN)8][AlCl4]3 has square dodecahedral YbN8 eight-co-ordination.Keywords
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