Electron spin resonance and mass spectra of substituted azo cresol complexes

Abstract

363acid was heated to -60-70 OC and then treated portionwise wlth bromine (0.01 mol) for 15 min. The mixture was stirred further for 3 h and poured into ice water. The solid separated was filtered and crystallized from a proper solvent to glve 8. R.gh3ry No. ; NHZNHP, 30241-2; CEHSNHNH?, 100-83-0 CEH&H*NH,, 100-48-9; p-CHSOCeHdNH, 104-94-9: CHSCONHNH,, 108&57-1; C & l~~, 8 1 3 -9 4 5 ; oHOC&I~COI"&, 93602-7; N a b , 26628-22-8; p CH&H4NHz, 10849-0. Llterature Clted (1) Curran, M. V. J . Med. Chem. 1074, 17, 273. (2) Nanninl, G.; Blasdi, G.; Penone, E.; Forglone, A,; Butthonl, A,; Ferrarl, M. Eur. J . W . Chemdhlm. Ther. 1078, 14, 53. Mohenwd, M. M.; EI-Haahash, M. A.; Islam, I.; Abo-Baker, 0. A. Rev. Roum. CMm. 1082, 27, 865. ECHaahash, M. A,; Hassan, M. A.; Sayed, M. A. Pa&. J . Sci. Id. Res. 1077, 20, 336. ECHashash, M. A.; El-Kady, M. Y., Mohamed. M. M. Indlan J . Chem. 1970, 18, 136. Aibright, J. D.; Moran, D. B.; Wright, W. B.; Collins, J. B.; Beer, B.; Lippa, A. S.; Greenblat, E. N. J . Med. Chem. 1011, 24, 592. Leclerc, G.; Wermuth, 0. 0. Bull. Soc. Chlm. Fr. 1071, 1752. Sliverstein, R. M.; Bassler, Q. C.; MonJII, T. C. "Spectrometric Identiflcation of Organic Compounds", 4th ed.; Wiley: New York,Trandtlon-metal complexes of substituted azo cresol compounds were prepared. The structures and the mode of bondlng were Investigated on the baris of mass spectra for all systems and electron rpln resonance for the copper complexes. The electronic characters of substltuents on the data are dlrcussed. The copper complexes glve anisotropic ESR spectra wlth axlal symmetry In tetragonal geometry for orbltally nondegenerate ground stater.

Synthesis and Characterization of New Azopyrimidine Complexes

“…From such data, the r-values were computed [31], Table V. It seems that copper [33,34]. The calculated g av from the relation g av ¼ (g k þ 2g ? )…”

Thermal and electrical behaviour of nickel(II) and copper(II) complexes of 4-acetylamino-2-hydroxy-5-methylazobenzene

“…The investigated complexes (I, II) were prepared as reported and their structures were proposed as in scheme 1 [11][12][13][14][15]. The differential thermal analysis (DTA) was carried out using Shimadzu XD-30 thermal analyzer.…”

“…Nowadays a number of solid state reactions (e. g., thermal isomerization, conformational changes, polymorphic transformations, thermal phase transitions, thermochromism, etc...) of some metal chelates have been studied by means of thermal analysis [1][2][3][4][5][6][7][8][9][10]. In our laboratory, the structural chemistry of some transition metal chelates of simple substituted-azobenzenes was characterized [11][12][13][14][15] based on spectral and magnetic susceptibility techniques, but no work has been done on their thermal properties. The major goal of the present manuscript is conducted to study the thermal behaviour of some of these complexes to throw more light on the solid state reactions present.…”