The dielectric constants and densities of dilute solutions of p-brombenaldehyde, p-tolualdehyde, p-hydroxybenzaldehyde and p-anisaldehyde in dioxane were measured at 25°. From the total polarization and the molecular refractivities the dipole moments were calculated to be 2.20, 3.27, 4.18 and 3.70x10-18 e.s.u., respectively. The angle between the aldehyde group moment direction and the line through the l, 4 C atoms of the benzene nucleus is calculated to be 51°. The angles between the directions of the OH and CHO group moments, and, between the CH3O and CHO group moments are 50° and 49°, respectively. The angle between the plane passing through the 1, 4 C atoms and those in which the moment vectors lie are 45° and 37°, respectively, for p-hydroxybenzaldehyde and p-anisaldehyde.
Proceedings of the Iowa Academy of Science
© Copyright 1934 by the Iowa Academy of Science, Inc.
Pearce, J. N. and Berhenke, L. F.
"The Dipole Moments of Certain Organic Compounds,"
Proceedings of the Iowa Academy of Science, 41(1), 141-142.
Available at: https://scholarworks.uni.edu/pias/vol41/iss1/39