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171 results on '"Ren, Zhi"'

12. ChemInform Abstract: A New Example of Linear Disiloxane: Synthesis and X-Ray Crystal Structure of Bis(2-silolyl)tetramethyldisiloxane

Author

Motoo Shiro, Shigehiro Yamaguchi, Ren-Zhi Jin, and Kohei Tamao

Subjects
Sodium, X-ray, chemistry.chemical_element, General Medicine, Crystal structure, Disiloxane, Chloride, Coupling (electronics), Metal, Crystallography, chemistry.chemical_compound, chemistry, visual_art, visual_art.visual_art_medium, medicine, medicine.drug
Abstract

Bis(2-silolyl)tetramethyldisiloxane has been obtained by an attempted Wurtz-type coupling of (2-silolyl)dimethylsilyl chloride using sodium metal, and its linear Si−O−Si geometry has been demonstrated by X-ray crystallography.

Published
2010

13. ChemInform Abstract: Synthesis of a Series of 1,1-Difunctionalized Siloles

Author

Kohei Tamao, Shigehiro Yamaguchi, Ren-Zhi Jin, and Motoo Shiro

Subjects
chemistry.chemical_compound, chemistry, Series (mathematics), Intramolecular force, Organic chemistry, General Medicine, Silane
Abstract

A series of 1,1-difunctionalized siloles have been synthesized from 1,1-diaminosiloles, which have been prepared via the intramolecular reductive cyclization of diaminobis(phenylethynyl)silane.

Published
2010

15. ChemInform Abstract: Modification of the Electronic Structure of Silole by the Substituents on the Ring Silicon

Author

Ren-Zhi Jin, Shigehiro Yamaguchi, and Kohei Tamao

Subjects
Trimethylsilyl, Silicon, Stereochemistry, chemistry.chemical_element, General Medicine, Electronic structure, Ring (chemistry), chemistry.chemical_compound, Crystallography, chemistry, Ab initio quantum chemistry methods, Atom, Absorption (electromagnetic radiation), HOMO/LUMO
Abstract

A series of 3,4-dimethyl-2,5-bis(trimethylsilyl)siloles having various substituents on the ring silicon atom have been prepared and their UV absorption spectra have been determined. Their absorption maxima steadily shifted to longer wavelengths as the 1,1-substituents on the ring silicon atom become more electronegative. Ab initio calculations at the HF/6-31G(d) level of theory showed that the nature of the 1,1-substituents strongly affects the HOMO and LUMO energy levels of the silole ring mainly due to inductive effects.

Published
2010

16. ChemInform Abstract: Halodesilylation Route to 2,5-Difunctionalized 3,4-Dialkylsiloles and Their Derivatization to 2,2′-Bisilole

Author

Shigeki Ohno, Shigehiro Yamaguchi, Ren-Zhi Jin, and Kohei Tamao

Subjects
chemistry.chemical_compound, Chemistry, Organic chemistry, General Medicine, Derivatization
Abstract

A new synthetic route to 2,5-difunctionalized 3,4-dialkylsiloles has been developed based on the selective halodesilylation of 2,5-disilyl-1,1,3,4-tetraalkylsiloles. A series of 2,5-dihalosiloles h...

Published
2010

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