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Halide abstraction from Pr(III) chloride by Sn(IV): formation and crystal structures of [Pr(MeCN)(9)][SnCl5(THF)](2.5)[SnCl5(MeCN)](0.5), [Pr(MeCN)(9)][SnCl5(MeCN)](3) and [PrCl2(THF)(5)][SnCl5(THF)]: identification of structural isomers of the nine co-ordinate [Pr(MeCN)(9)](3+) cation
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UNSPECIFIED (2001) Halide abstraction from Pr(III) chloride by Sn(IV): formation and crystal structures of [Pr(MeCN)(9)][SnCl5(THF)](2.5)[SnCl5(MeCN)](0.5), [Pr(MeCN)(9)][SnCl5(MeCN)](3) and [PrCl2(THF)(5)][SnCl5(THF)]: identification of structural isomers of the nine co-ordinate [Pr(MeCN)(9)](3+) cation. Inorganica Chimica Acta, 318 (1-2). pp. 97-102. ISSN 0020-1693
Full text not available from this repository.Abstract
Treatment of PrCl3 with SnCl4 and dibenzo-24-crown-8 in MeCN/THF (60/40) afforded [Pr(MeCN)(9)][SnCl5-(THF)](2.5)[SnCl5(MeCN)](0.5) (I) as the only isolated product. From the crystal structure determination (X-ray diffraction) the nine co-ordinate Pr atom adopts a tricapped trigonal prismatic geometry with Pr-N bond distances in the range (2.577(4)-2.615(5) Angstrom), whilst one of the three Sn(IV) counteranions has half-occupancy between THF and MeCN at the solvent position. Subsequent investigation of the PrCl3/SnCl4/S (solvent) system reveals that with S = MeCN complete halide abstraction leads to the formation of [Pr(MeCN)(9)][SnCl5 (MeCN)](3) (II), regardless of the stoichiometry employed. In this case the cationic Pr metal centre adopts a slightly distorted mono-capped square prismatic geometry with Pr-N-prism bond distances (2.583(9), 2.502(9)Angstrom) and Pr-N-capping (2.645(17) Angstrom). Conversion of the (idealised) monocapped square prismatic isomer (II) to the tricapped trigonal prismatic isomer (I) is discussed. Treatment of PrCl3 with SnCl4 with S = THF leads to the formation of [trans-PrCl2(THF)(5)][SnCl5(THF)] (III) in which the cation is seven co-ordinate and features a trans-PrCl2 unit (axial) Pr-Cl (2.6767(9) Angstrom) with five THF molecules in an equatorial girdle to give a pentagonal bipyramidal metal geometry Pr-O (2.467(4)-2.489(3) Angstrom). (C) 2001 Elsevier Science B.V. All rights reserved.
| Item Type: | Journal Article |
|---|---|
| Subjects: | Q Science > QD Chemistry |
| Journal or Publication Title: | Inorganica Chimica Acta |
| Publisher: | ELSEVIER SCIENCE SA |
| ISSN: | 0020-1693 |
| Date: | 18 June 2001 |
| Volume: | 318 |
| Number: | 1-2 |
| Number of Pages: | 6 |
| Page Range: | pp. 97-102 |
| Publication Status: | Published |
| URI: | http://wrap.warwick.ac.uk/id/eprint/12065 |
Data sourced from Thomson Reuters' Web of Knowledge
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