7171-70-2Relevant articles and documents
Experimental standard molar enthalpies of formation of crystalline 3,5-dimethylpyrazole, 3,5-dimethyl-4-nitrosopyrazole, 1,3,5-trimethyl-4-nitrosopyrazole, and 3,5-dimethyl-1-phenyl-4-nitrosopyrazole
Ribeiro da Silva, Maria D.M.C.,Ferreira, Susana C.C.,Rodrigues, Ivone A.P.,Da Silva, Luis C.M.,Acree Jr, William E.,Pandey, Siddharth,Roy, Lindsay E.
, p. 1227 - 1235 (2007/10/03)
Static-bomb calorimetry was used to measure standard molar enthalpies of combustion in oxygen for crystalline compounds. The standard molar enthalpies of formation of the crystalline compounds were derived using the measured values. The values of the stan
Studies in nitrosopyrazoles. Part 1. Preparative and spectroscopic studies of some 3,5-dialkyl-4-nitrosopyrazoles
Cameron, Mailer,Gowenlock, Brian G.,Boyd, Alan S. F.
, p. 2271 - 2274 (2007/10/03)
The preparations of a number of 3,5-disubstituted- and 1,3,5-trisubstituted-4-nitrosopyrazoles are described and a range of physical properties of these compounds are measured. Comparison is made with some 2,6-disubstituted nitrosobenzenes and it is shown from 13C NMR spectroscopy that the effects of substitution by flanking tert-butyl groups are moderated in the case of the pyrazoles from those in the aromatic C6 ring due to a lessening of steric hindrance. It is also suggested that steric effects are evident in the preparation of 1,3,5-substituted-4-nitrosopyrazoles when one of the flanking groups to the NO is tert-butyl or phenyl, there being no such effect for the corresponding case of the isobutyl group.
