ISSN:
0948-5023
Keywords:
Ab initio
;
Structural stability
;
Rotational barrier
;
3-Cyclopropenecarboxaldehyde
;
3-Cyclo-propenecarboxylic acid fluoride
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
Abstract The structural stability and internal rotation in 3-cyclopropenecarboxaldehyde and 3-cyclo-propenecarboxylic acid fluoride were investigated by ab initio calculations with a 6-31G* atomic basis in the latter and a 6-311G* atomic basis set in the former case. For the sake of comparison also results obtained with a 3-21G basis are given in the paper. As expected, it turned out that this basis set is not large enough for three-membered rings. The calculations were carried out both at the Restricted Hartree-Fock (HF) and the second order Moller-Plesset (MP2) levels. The trans-form is predicted to be the lower energy conformer for both molecules. However, in case of the fluoride the two conformers have nearly the same energy. Full optimization was performed at the transition states and the asymmetric potential function for the CXO internal rotations was predicted for both molecules.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/s0089480040158
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