Alcohol Solvates of Lanthanoid(III) Trifluoromethanesulfonates |
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| Authors: | Eric J. Chan Jack M. Harrowfield Prof. Dr. Ward T. Robinson Brian W. Skelton Alexandre N. Sobolev Allan H. White |
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| Affiliation: | 1. School of Biomedical, Biomolecular and Chemical Sciences, Chemistry M313, The University of Western Australia, Crawley, Australia, Fax: +33‐390‐245140;2. Laboratoire de Chimie Supramoléculaire, Institut de Science et d'Ingénierie Supramoléculaires, 67083 Strasbourg, France;3. Department of Chemistry, University of Canterbury, Christchurch, New Zealand |
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| Abstract: | After vacuum dehydration, a number of hydrated trivalent lanthanoid trifluoromethanesulfonates (“triflate”, “OTf” = F3CSO3), when recrystallized from various alcohol (ROH) solutions, yield solvates Ln(OTf)3 · xROH, x = 3, 5 or 6. The following have been defined crystallographically (R/Ln/x): Me/La/3;Me/Gd/6; Et/Sm/3; Et/Gd/5 iPr/Nd,Sm/3. The Me/Gd/6complex, Gd(OTf)3 · 6MeOH is a mononuclear/ionic form [(MeOH)6Gd(O–OTf)2](OTf), the gadolinium environment being octacoordinate, square‐antiprismatic with the O–OTf donors quasi‐trans on different faces of the coordination polyhedron; the Et/Gd/5 complex is neutral, molecular, mononuclear [(EtOH)5Gd(O–OTf)3], also with an octacoordinate, square‐antiprismatic coordination sphere, derivative of that of the methanol solvate. The remainder form one‐dimensional polymeric arrays, successive lanthanoid atoms linked by (μ‐O–OTf–O′)3 triads, at either end of a tricapped trigonal prismatic array, the ROH molecules contributing the capping atoms. A (“baseline”) (re‐)determination of the “parent” Sm(OTf)3 · 9H2O is also recorded. |
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| Keywords: | Lanthanides Rare earth compounds Alcohol complexes Coordination modes X‐ray diffraction |
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