Conformational preferences of 4-(para-substituted phenyl)2-isopropoxy-2,3-dihydropyran[2,3-c]pyrazoles: an example of dipole–dipole interaction
- 1 January 1977
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Perkin Transactions 2
- No. 13,p. 1725-1728
- https://doi.org/10.1039/p29770001725
Abstract
A linear dependence between conformational free energy and dipole moments was observed for a series of 4–(para-substituted phenyl)-cis[2,4]- and trans[2,4]-2-isopropoxy-2,3-dihydropyran[2,3-c]-pyrazoles. The interaction is rationalized in terms of dipole–dipole interactions, and this is supported to a certain extent by CNDO/2 calculation of electron densities is model compounds.Keywords
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