Synthesis and Characterisation of Novel Main Group Element Clusters with Tin-Phosphorus, Tin-Arsenic, and Germanium-Phosphorus Skeletons

✍ Scribed by Donna Nikolova; Carsten von Hänisch; Ariane Adolf

• Publisher: John Wiley and Sons
• Year: 2004
• Tongue: English
• Weight: 144 KB
• Volume: 2004
• Category: Article
• ISSN: 1434-1948
• DOI: 10.1002/ejic.200300744

✦ Synopsis

Abstract

The reaction of __i__Pr~3~SiPLi~2~ with SnCl~2~ in the mol ratio 1:1 leads to the formation of [Sn~7~(PSi__i__Pr~3~)~7~] (1). The cluster [Sn~8~(PSi__i__Pr~3~)~6~Cl~2~] (3) is obtained, if the same reaction is carried out with a slight excess of the metal salt. Similar lithium chloride elimination reactions between SnCl~2~ and __i__Pr~3~SiAsLi~2~ in the mol ratio 1:1 and 2:3, however, yield [Sn~7~(AsSi__i__Pr~3~)~7~] (2) and [Sn~4~(AsSi__i__Pr~3~)~6~Li~4~(Et~2~O)~2~] (4), respectively. The metal salt GeCl~2~(diox)~2~ (diox = 1,4‐dioxane) reacts with __i__Pr~3~SiPLi~2~ to give [Ge~6~(PSi__i__Pr~3~)~6~] (5). Compounds 1−5 were characterised by NMR and IR spectroscopic techniques as well as elemental analysis. The crystal structures were identified by X‐ray diffraction analysis, which confirmed that the heptameric skeletons of 1 and 2 are structurally analogous. The Sn/P cluster 3 contains subvalent tin atoms, while 4 forms a Sn~4~As~6~Li~4~ rhombododecahedron and 5 a slightly distorted hexagonal prism. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004)