Crystallographic Data. 163. Tetra-p-Biphenylsilane

Hinch, R. J.; Krc, John

doi:10.1021/ac60130a600

Cited by 6 publications

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“…These facts correspond with an early Xray crystallographic study reporting, however, only on the space group and cell dimensions were given [27]. Based on the present study, it is shown that the tetragonal symmetry of the molecule remains in the crystal lattice ( Fig.…”

Section: Molecular Features Of 1-5supporting

confidence: 91%

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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Section: Molecular Features Of 1-5supporting

confidence: 91%

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

Schwarzer

Schilling

Seichter

et al. 2009

Silicon

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“…Since birefringence is related to crystal structures, studies on molecular structures and packing in a crystal are important. In 1957, birefringence of tetrakis(4-phenylphenyl)silane was reported (Hinch & Krc, 1957).…”

Section: S1 Commentmentioning

confidence: 99%

1,1,3,3-Tetra-tert-butyl-2,2-diisopropyl-4,4-diphenylcyclotetrasilane

Kuribara

Kyushin

2012

Acta Cryst E

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Key indicators: single-crystal X-ray study; T = 173 K; mean (C-C) = 0.004 Å; R factor = 0.048; wR factor = 0.095; data-to-parameter ratio = 16.1.The molecule in the structure of the title compound, C 34 H 60 Si 4 , lies on a twofold rotation axis that passes through the two Si atoms, resulting in a planar cyclotetrasilane ring. The dihedral angle between the cyclotetrasilane ring and the phenyl ring is 68.20 (5) . The Si-Si bonds [2.4404 (8) and 2.4576 (8) Å ] are longer than a standard Si-Si bond (2.34 Å ) and the C-Si-C bond angle [97.07 (14) ] of the phenylsubstituted Si atom is smaller than the tetrahedral bond angle (109.5 ). These long bonds and small bond angle are favorable for reducing the steric hindrance among the bulky substituents. Related literature

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C48

Schudt¹,

Weitz²

Structure Data of Organic Crystals

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Crystallographic Data. 163. Tetra-p-Biphenylsilane

Cited by 6 publications

References 0 publications

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

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

1,1,3,3-Tetra-tert-butyl-2,2-diisopropyl-4,4-diphenylcyclotetrasilane

C48

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