By F G A Stone; Robert West
ADVANCES ORGANOMETALLIC CHEMISTRY V 7.
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Extra info for Advances in Organometallic Chemistry, 7
Prompted by this observation, we examined a number of compounds incidental to our expanding polysilane studies in the series, Ph(SiMe&Ph, where n = 2-6. T h e successive interposing of dimethylsilylene units between the phenyl groups should effectively diminish the interaction between the phenyl groups. However, quite the opposite was observed and the behavior noted can be considered to be analogous to the properties of the a,o-diphenylpolyenes. This implied that the polysilane chain itself might absorb ultraviolet radiation without the presence of phenyl groups.
Molecular ions were obtained for each of these substances which confirmed our previous structural formulations based largely on chemical transformations, particularly that of ring cleavage. I n order to compare certain of the spectral features with a nonphenylated type, the spectrum of dodecamethylcyclohexasilane was measured. The major fragment ions in all four compounds are rearrangement ions resulting from phenyl or methyl migration. Fragmentation mechanisms and structures for the major ions have been proposed, using the many observed metastable ions as an aid.
Organometal. Chem. 1,89 (1964). 28. , and Winkler, H. J. , in “Organometallic Chemistry” (H. ), p. 270. Reinhold, New York, 1960. 29. , and Wright, G. , Chem. Rew. 11, No. 3, 323 (1932). 30. , and Yale, H. , Chem. Rev. 30, No. 2, 281 (1942). 31. Ingham, R. , in “ Inorganic Polymers” (F. G. A. Stone and W. A. G. ), p. 321. Academic Press, New York, 1962. 32. Ingham, R. , in “Introduction to Organotin Chemistry” (A. K. ), M. Dekker, New York, 1968. 33. Ingham, R. , Rosenberg, S. , Chem. Rew. 60, No.
Advances in Organometallic Chemistry, 7 by F G A Stone; Robert West