
TY  - JOUR
A1  - Lincoln, SF 
A1  - Hounslow, AM 
A1  - Maeji, NJ 
A1  - Hambley, TW 
A1  - Snow, MR 
A1  - Jones, AJ 
T1  - A structural and carbon-nitrogen bond rotation study of N,N,N',N',2,2-hexamethylpropanediamide
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 1983
VL  - 36
IS  - 9
SP  - 1865
EP  - 1871
KW  - 
UR  - https://doi.org/10.1071/CH9831865 
N2  - 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. 
ER  -

