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- W2040553697 abstract "The properties of 1-sila- and 1-gemma-cyclopent-2-(or -3-)enes with various substituents have been investigated by 13C and 1H NMR spectroscopies. Values of chemical shifts and coupling constants in olefinic cyclic systems and in aromatic or ethylenic substituents attached to the hereto atom suggest the presence of a mesomeric pπdπ interaction, particularly for the silicon atom. Studies at low temperatures given conformational data, which have been compared with data from the literature. Une série de sila-1 et germa-1 cyclopent-2 (ou -3) ènes diversement substitués a fait l'objet d'une étude par spectrographies RMN 13C et 1H. L'examen des déplacements chimiques et constantes de couplage des systèmes éthyléniques cycliques et des substituants éthyléniques ou aromatiques portés par l'hétéro-atome suggère l'intervention d'une interaction mésomère pπdπ particulièrement en ce qui concerne le silicium. Les mesures à très basse température appor apportent des informations d'ordre conformationnel qui ont été confrontées aux données de la litérature." @default.
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- W2040553697 date "1977-09-01" @default.
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- W2040553697 title "Application des spectrographies RMN 13C et 1H a l'etude de derives cycliques du silicium et germanium, interactions pπdπ" @default.
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- W2040553697 doi "https://doi.org/10.1016/s0022-328x(00)80838-4" @default.
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