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Formation and Reactivity of Unsymmetrical Bis(ketenes): 2-Phenyl- and 2-Methyl-3-(trimethylsilyl)-1,3-butadiene-1,4-diones

โœ Scribed by Allen, Annette D.; Lai, Wing-Yan; Ma, Jihai; Tidwell, Thomas T.

Book ID
126880958
Publisher
American Chemical Society
Year
1994
Tongue
English
Weight
281 KB
Volume
116
Category
Article
ISSN
0002-7863

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Silyl stabilization of unsymmetrical bis
Silyl stabilization of unsymmetrical bisketenes: 3-(Trimethylsilyl) and 3-(triisopropylsilyl)-2-substituted-1,3-butadiene-1,4-diones
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The bisketenes 2-phenyl and 2-methyl-3-(trimethylsilyl)-1,3-butadiene-l,4dione (8 and 10) are calculated on the basis o f additivity of substituent effects to be less stable than the 3-phenyl and 3-methyl-4-(trimethylsilyI)cyclobut-3-ene-l,2-diones (7 and 9) by 1.9 and 2.6 kcal/mol, respectively. In

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Crystal structure and theoretical investigation of the configurations of 1,3-dichloro-1,3-diazetidine-2,4-dione and 1,3-bis(trimethylsilyl)-1,3-diazetidine-2,4-dione
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## Crystal structures o f 1 ,3-dichloro-l,3-diazetidine-2,4dione (1) and the hitherto unknown compound 1,3bis(trimethylsilyl)-1,3-diazetidine-2,4-dione (2) have been determined by X-ray crystallography: 1: (CINCO),,