New aryl ethynylene substituted silicon-centered molecules

Palitzsch, Wolfram; Nitsche, Silke I.; Seichter, Wilhelm; Weber, Edwin; Roewer, Gerhard

doi:10.1023/b:silc.0000047925.29573.88

Cited by 2 publications

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“…Previously, we were successful in the synthesis of some arylethynyl substituted silicon-centered [22] or related bulky organosilicon compounds showing the property of crystalline inclusion formation [23]. Here, we report on the crystal structures of four tetrakis(arylethynyl)silanes (1)(2)(3)(4) differing in the substitution of the aryl rings, including also compound 5 which is an analogue of 4 without the ethynylene units (Scheme 1).…”

Section: Introductionmentioning

confidence: 95%

Synthesis and X-ray Crystal Structures of New Tetrahedral Arylethynyl Substituted Silanes

Schwarzer

Schilling

Seichter

et al. 2009

Silicon

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The tetrakis(arylethynyl)silanes 1-4 of which 2-4 are new compounds have been synthesized and determined by single crystal structure analysis to show their tetrahedral molecular geometries reflected in slightly disturbed S 4 symmetry in the crystal lattices. The lattice structures are mainly determined by close packing effects while the interactions of π-stacking type or C-H···π contacts are rather secondary. A similar behaviour is found for the crystal structure of the comparative compound 5 with reference to 4 which lacks the ethynylene units. It is demonstrated that the given molecular constructions are distinguished by a high degree of tetrahedral persistency governing the packing structures.

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