## Abstract ^13^C NMR data for several 1โsubstituted propโ2โynes and 1,4โbis derivatives of butโ2โyne are reported with full assignments. Substituent effects of โXโaryl groups (X = O, S, NMe, SO~2~) at the propargylic position on the chemical shifts of the acetylenic carbons were determined.
Carbon-13 NMR spectra of 1,6-bis derivatives of hexa-2,4-diynes
โ Scribed by K. C. Majumdar; R. N. De; B. K. Sen; A. Banerji; A. K. Mitra
- Publisher
- John Wiley and Sons
- Year
- 1988
- Tongue
- English
- Weight
- 215 KB
- Volume
- 26
- Category
- Article
- ISSN
- 0749-1581
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๐ SIMILAR VOLUMES
Nineteen derivatives of (1 R)-(+)camphor with deutero, fluoro, bromo, iodo, keto, and hydroxyl functionalities at carbons 3, 5, 8, or 9 have been examined using 13C NMR. The chemical shifts for each carbon of these substituted camphor derivatives have been assigned using broad band decoupling and th
The 1,6-bis(2,5-dimethoxyphenyl)hexa-2,4-diynes 4a-c were hexa-2,4-diyne unit is observed, with the 1,6-diphenyl substituents arranged in a coplanar orientation. According to obtained from the corresponding 2,5-dimethoxybenzenes 1 by bromination followed by a copper-catalyzed Grignard the crystal st