π-Complexes of p-Block Elements: [(η6-C6Me6)Sn(AlCl4)2]2•3 C6H6 — a Dimeric Coordination Compound of Hexamethylbenzene with Sn(AlCl4)2
Open Access
- 1 October 1989
- journal article
- research article
- Published by Walter de Gruyter GmbH in Zeitschrift für Naturforschung B
- Vol. 44 (10) , 1175-1178
- https://doi.org/10.1515/znb-1989-1005
Abstract
Dimeric (η6-hexamethylbenzene)tin(II)bis(tetrachloroaluminate), [(η6-C6Me6)Sn(AlCl4)2]2, has been obtained from the reaction of anhydrous SnCl2, AlCl3, and hexamethylbenzene in the molar ratio of 1:2:1 in benzene as a solvent. The complex, which crystallizes in the triclinic space group PĪ, contains a folded eight-membered ring Al2Sn2Cl4 2+, with the two tin(II) centers linked by two bidentate bridging AICl4- counterions. Each tin(II) atom is η6-bonded to a hexamethylbenzene ring at a distance of 2.45 Å — the shortest Sn-to-arene distance ever found in the tin(II)/arene system. Each tin(II) atom is further connected to another AICl4- anion, also acting as a bidentate ligand, but without contacts to other tin(II) centers. The three crystal benzene molecules show no specific metal contacts.Keywords
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