
%0 Journal Article
%A Lincoln, SF 
%A Hounslow, AM 
%A Maeji, NJ 
%A Hambley, TW 
%A Snow, MR 
%A Jones, AJ 
%T A structural and carbon-nitrogen bond rotation study of N,N,N',N',2,2-hexamethylpropanediamide
%J Australian Journal of Chemistry
%D 1983/09/01
%V 36
%N 9
%P 1865-1871
%K 
%R https://doi.org/10.1071/CH9831865
%U https://www.publish.csiro.au/paper/CH9831865 
%X The molecular structure of N,N,N',N',2,2-hexamethylpropanediamide has been determined in the solid state by X-ray diffraction methods. The structure of Me2NCOCMe2CONMe2 may be broadly described as two planar Me2NCO entities intersecting at the tetrahedral -CMe2- site. The angle between the normals to the two Me2NCO planes is 104.6º, and the two oxygen atoms are disposed outwards from the molecule and away from each other. Proton (270-MHz) n.m.r. studies yield k(320 K) 32.0 ± 3.2 s-1, &#916;H&#8225; 69.5 ± 0.4 kJ mol-1 and &#916;S&#8225; 0.6 ± 1.1 J K-1 mol-1 for rotation of the N-methyl groups about the carbon-nitrogen bonds in CD3NO2 solution. Similar magnitudes for the kinetic parameters characterizing this process are obtained in CDCl3, and CD3CN solutions. 
