21046-05-9Relevant academic research and scientific papers
Synthesis and spectral comparison of electronic and molecular properties of some hydrazines and hydrazyl free radicals
Ionita, Petre,Lete, Cecilia,Madalan, Augustin,Matache, Mihaela,Patrascu, Bianca,Paun, Anca,Popescu, Codruta
, (2020/08/28)
Continuing our work on hydrazyl free radicals, five triphenylhydrazine derivatives, one a new compound, were synthesized to compare the electronic and molecular properties of these compounds, study the influence of substituents on the phenyl rings, and compare their properties with the parent hydrazines and corresponding anions. These hydrazines demonstrate both acid-base and redox properties. The hydrazine proton can be removed by base, yielding the corresponding anion and both the hydrazines and their anions can be oxidized to the corresponding hydrazyl free radicals. ESR spectra confirmed their formation and X-ray crystallography of one compound confirmed their structures.
Synthesis based on 9-amino-N-picrylcarbazyl
Ionita,Caproiu,Meghea,Maior,Rovinaru,Ionita
, p. 1177 - 1183 (2007/10/03)
Starting from 9-amino-N-picrylcarbazole, the nitro-, cyano-, bromo- and dibromo-derivatives of the title compound, and the corresponding free radicals, were synthesized. The pKa values and the redox properties of the compounds synthesized were reported.
Crystal and molecular structure of 9-(2,4,6-trinitroanilino)-carbazole, C18H11N5O6
Wang, Hong,Barton, Richard J.,Robertson, Beverly E.,Weil, John A.,Brown, Keith C.
, p. 1322 - 1326 (2007/10/02)
The crystal structure of 9-(2,4,6-trinitroanilino)-carbazole, C18H11N5O6, has been determined by X-ray diffraction.Crystals are monoclinic, space group P21/c, a = 14.686(11), b = 24.601(12), c = 10.047(5) Angstroem, β = 107.76(5) deg at 292 K, with Z = 8.The two nitrogen atoms in the central fragment have a staggered conformation with an N-N distance of 1.381(4) Angstroem, which is considerably shorter than N-N distances in related N-picrylhydrazine molecules.The picryl moiety has a geometry similar to that of related N-picrylhydrazine molecules.The title compound contains an N-H...O intramolecular bond to one of the ortho nitro gro ups on the picryl ring.The carbazole plane of one molecule and the picryl plane of a neighboring molecule overlap to form an infinite linear chain of the form ...DhA:DhA... where D represents the carbazole donor, h the linear chain linkage within the molecule, and A represents the picryl acceptor of one molecule.The two interplanar distances between D of one molecule and A of an adjacent molecule are 3.28(13) and 3.34(13) Angstroem, indicating a strong ?-molecular interaction.
