Synthesis and 1H and 13C nuclear magnetic resonance spectra of some 4-alkylidene-1-pyrazolines and alkylidenecyclopropanes
- 1 April 1978
- journal article
- Published by Canadian Science Publishing in Canadian Journal of Chemistry
- Vol. 56 (7) , 992-997
- https://doi.org/10.1139/v78-166
Abstract
The 1Hmr and 13Cmr spectra for 15 4-alkylidene-1-pyrazolines and 19 alkylidenecyclopropanes are reported. The assignments of E and Z isomers are made on the basis of shielding effects about the exo cyclic double bonds. The addition of diazomethane-d2 to 1,2-butadiene is shown to be both regiospecific and stereospecific.Keywords
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