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1,1,3,3-Tetra-tert-butyl-2,2-diisopropyl-4,4-diphenyl-cyclo-tetra-silane.

ABSTRACT: The molecule in the structure of the title compound, C34H60Si4, lies on a twofold rotation axis that passes through the two Si atoms, resulting in a planar cyclo-tetra-silane ring. The dihedral angle between the cyclo-tetra-silane 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 phenyl-substituted Si atom is smaller than the tetra-hedral bond angle (109.5°). These long bonds and small bond angle are favorable for reducing the steric hindrance among the bulky substituents.

SUBMITTER: Kuribara T

PROVIDER: S-EPMC3588281 | biostudies-literature | 2013 Jan

REPOSITORIES: biostudies-literature

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1,1,3,3-Tetra-tert-butyl-2,2-diisopropyl-4,4-diphenyl-cyclo-tetra-silane.

Kuribara Takayoshi T Kyushin Soichiro S

Acta crystallographica. Section E, Structure reports online 20121222 Pt 1

The molecule in the structure of the title compound, C34H60Si4, lies on a twofold rotation axis that passes through the two Si atoms, resulting in a planar cyclo-tetra-silane ring. The dihedral angle between the cyclo-tetra-silane 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 phenyl-substituted Si atom is smaller than the tetra-hedral bond angle (109.5°). These lo ...[more]

PMID: 23476402

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