Unusual routes to complexes of binary alkali metal–non-metal compounds: preparations and crystal and solution structures of Li2S6·(tmeda)2(tmeda = etramethylethylenediamine), and synthetic extensions of the routes
- 1 January 1990
- journal article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Chemical Communications
- No. 2,p. 105-107
- https://doi.org/10.1039/c39900000105
Abstract
The complex Li2S6·(tmeda)2(tmeda = tetramethylethylenediamine) was obtained by reactions of BunLi solution or Li metal or LiH solid with S powder suspended in toluene containing tmeda, or by tmeda/toluene extraction of the product from reaction of LiBH4 and S (1 : 3 molar ratio) in tetrahydrofuran (thf): its crystal structure contains a central Li2S2 ring and there are alternating types of bond in the S6 2– residue; in donor solvents, this dianion cleaves to give the bright blue S3[graphic omitted] radical anion; several other complexes of type (MXy·xL)n have been prepared from reactions of alkali metals (M = Li, Na, K) with non-metals (X = S, Se, Te, P, As) in toluene containing stoicheiometric amounts of donors [L = hexamethylphosphoramide (hmpa), tmeda, pentamethyldiethylenetriamine (pmdeta)].Keywords
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