99766-47-9Relevant academic research and scientific papers
Enthalpies of combustion of 2,2',6,6'-tetraethylazobenzene N,N-dioxide, 2,4,6--tri(1,1-dimethylethyl)nitrosobenzene, and 2,4,6-tri(1,1-dimethylethyl)nitrobenzene
Acree, W. E.,Bott, S. G.,Tucker, Sheryl A.,Silva, Maria D. M. C. Ribeiro da,Matos, M. Agostinha R.,Pilcher, G.
, p. 1433 - 1440 (1995)
The standard (po = 0.1 MPa) molar enthalpies of combustion at the temperature T = 298.15 K were measured by static-bomb calorimetry for crystalline 2,2',6,6'-tetraethylbenzene N,N-dioxide, 2; 2,4,6-tri(1,1-dimethylethyl)nitrosobenzene, 2,4,6-3C6H2NO; and 2,4,6-tri(1,1-dimethylethyl)nitrobenzene, 2,4,6-3C6H2NO2.The standard molar enthalpies of sublimation at T = 298.15 K of the tri(1,1-dimethylethyl) compounds were measured by microcalorimetry. .The standard molar enthalpy of decomposition of 2 to form 2,2-(C2H5)2C6H3NO(g) at T = 298.15 K was measured by microcalorimetry: ΔdecHmo/(kJ*mol-1) = (200.6 +/- 5.6).Application of group-additivity schemes applied to nitrosobenzene and nitrobenzene derivatives shows that 2,4,6-tri(1,1-dimethylethyl)nitrosobenzene is unstrained whereas the corresponding nitrocompound shows considerable strain in accord with an X-ray structure analysis demonstrating that steric hindrance prevents dimerization of the nitrosoderivative,
