| Autor: |
Medvedeva, A., Margorskaya, O., Kalikhman, I., Golovanova, N., Shergina, N., Vyazankin, N. |
| Zdroj: |
Bulletin of the Academy of Sciences of The USSR, Division of Chemical Science; 1988, Vol. 37 Issue 2, p246-249, 4p |
| Abstrakt: |
Trialkylsilyl(germanyl)propynals show a lower triple bond polarization compared with their carbon analogs because of the electron acceptor effects of the R substituents and the aldehyde group. This increases the inertness of the C≡C bond towards nucleophiles (RSH, RNH) and lowers the regioselectivity of dipolar attack. Lowering the relative basicity of the substituted propynals decreases the integrated intensity of the C=0 absorption band and shifts the δO signal to low field. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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