High resolution1H NMR studies of cyclicN-nitrosamines
作者:M. J. Milewska、T. Poloński
DOI:10.1002/mrc.1260321012
日期:1994.10
molecular mechanics (MM2) calculations were used to predict conformational preferences of cyclic N‐nitrosamines. The results were compared with 1H NMR data. The observed geminalcouplingconstants 2J were considerably stronger for syn than for anti α‐methyleneprotons and thus appear to be very useful for configurational predictions. The long‐range 4J couplings across the nitrogen atom were observed directly