110014-60-3Relevant academic research and scientific papers
VARIABLE TEMPERATURE ESR SPECTRA OF 1-(3,4,5-TRIMETHOXY-BENZOYL)-2,2-BIS(3,5-DI-TERT-BUTYL-PHENYL)HYDRAZYL AND ITS 1-(15)N-CONGENER
Crasovschi, Afanase,Grecu, Nicoleta,Negoita, Nicolae,Caproiu, Miron Teodor,Balaban, Alexandru T.
, p. 1335 - 1340 (2007/10/03)
The title free radicals were obtained by oxidation of the corresponding hydrazines which were synthesized and characterized by elemental analysis, IR and 1H-NMR spectra. The ESR spectra of the free radicals were recorded in toluene in the temperature range -50 deg C to +90 deg C. The simulated ESR spectra indicate a higher spin density at the tricoordinated N-2 nitrogen of the diarylamino group (hfc aN = 0.862 mT) than at the dicoordinated N-1 nitrogen atom (hfc aN = 0.830 mT). In the temperature range 0 deg C to 30 deg C the activation free energy for interconversion of conformers was determined to be ΔG(excit.) = 7.80 kcal/mol.
Factors affecting stability and equilibrium of free radicals. XIX. Spin distribution in 1-cyano-2,2-bis(3,5-di-t-butylphenyl)hydrazyl and its 1-(15)N-congener
Caproiu, M. T.,Negoita, N.,Grecu, N.,Crasovschi, A.,Bologa, U.,Balaban, A. T.
, p. 270 - 272 (2007/10/02)
The oxidation of 1-cyano-2,2-bis(3,5-di-t-butylphenyl)hydrazine and its 15N congener, with lead dioxide or tetraacetate affords the corresponding hydrazyl radicals.ESR spectra of the products in solution indicate that the two aryl groups are ma
