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Synthesis and characterization of 1,2-disubstituted vinylsilanes and their geometric differentiation with 3J(29Si,1H)-coupling constants. Application of a novel heteronuclearJ-resolved NMR experiment


Bratovanov, Svetoslav; Koźmiński, Wiktor; Fässler, Jürg; Molnar, Zoltan; Nanz, Daniel; Bienz, Stefan (1997). Synthesis and characterization of 1,2-disubstituted vinylsilanes and their geometric differentiation with 3J(29Si,1H)-coupling constants. Application of a novel heteronuclearJ-resolved NMR experiment. Organometallics, 16(14):3128-3134.

Abstract

The 3J(29Si,1H)-coupling constants of a number of vinylsilanes have been accurately determined with the ACT-J-NMR experiment. For all investigated samples the values of the 3Jtrans-coupling constants were found to be significantly larger than the corresponding values of the 3Jcis-coupling constants (8.8-20.5 Hz versus 3.1-11.9 Hz). Since substituent effects were characterized over a wide range, a conclusive assignment of the double-bond geometry of a particular vinylsilane by means of a single 3J(29Si,1H)-coupling constant is now possible even though the ranges of the 3Jcis- and the 3Jtrans-values overlap.

Abstract

The 3J(29Si,1H)-coupling constants of a number of vinylsilanes have been accurately determined with the ACT-J-NMR experiment. For all investigated samples the values of the 3Jtrans-coupling constants were found to be significantly larger than the corresponding values of the 3Jcis-coupling constants (8.8-20.5 Hz versus 3.1-11.9 Hz). Since substituent effects were characterized over a wide range, a conclusive assignment of the double-bond geometry of a particular vinylsilane by means of a single 3J(29Si,1H)-coupling constant is now possible even though the ranges of the 3Jcis- and the 3Jtrans-values overlap.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Department of Chemistry
Dewey Decimal Classification:540 Chemistry
Language:English
Date:8 July 1997
Deposited On:24 Aug 2017 16:13
Last Modified:27 Aug 2017 05:00
Publisher:American Chemical Society (ACS)
ISSN:0276-7333
Publisher DOI:https://doi.org/10.1021/om9701579

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