Accession Number : AD0449482

Title :   DETERMINATION OF THE HAMMETT SIGMA-CONSTANTS FOR THE PICRYL GROUP,

Corporate Author : NAVAL ORDNANCE LAB WHITE OAK MD

Personal Author(s) : Ruskie, Howard E. ; Kaplan, Lloyd A.

Report Date : NOV 1964

Pagination or Media Count : 8

Abstract : By measuring the rates of reaction of meta and para-picrylbenzoic acids with diphenyldiazomethane in ethanol, the Hammett constants sigma sub meta and sigma sub para for the picryl group were found to be 0.433 and 0.413 respectively. The ordering and magnitude of these constants indicates that there is no resonance interaction of the picryl group with the reaction site in the benzene ring to which it is attached. (Author)

Descriptors :   (*AROMATIC COMPOUNDS, REACTION KINETICS), (*NITRATES, REACTION KINETICS), (*REACTION KINETICS, AROMATIC COMPOUNDS), CARBOXYLIC ACIDS, POLYCYCLIC COMPOUNDS, NITROGEN HETEROCYCLIC COMPOUNDS, STEREOCHEMISTRY, RESONANCE.

Distribution Statement : APPROVED FOR PUBLIC RELEASE