E. A. Dorko, J. Hencher, S. Bauer
1968
Citations
0
Influential Citations
26
Citations
Journal
Tetrahedron
Abstract
Abstract The molecular structure of trimethylenecyclopropane has been determined from electron diffraction data obtained on the vapor. Planarity of the molecule was assumed and shrinkages were calculated from the evaluated non-bonded CC distances. The geometric parameters calculated by least squares from the molecular intensity [qM(q)] are: The calculated shrinkges are: δC1C6 = 0.009 A; δC2C6 = 0.028 A. The uncertainties quoted for the distances are twice the calculated standard deviations. A variation of Walsh's model for the bonding in cyclopropane is proposed, to account for reported differences in bond lengths between trimethylenecyclopropane and several related molecules. The structural data suggest that delocalization is present in these 3-member rings.