ISSN:
0377-0486
Keywords:
Chemistry
;
Analytical Chemistry and Spectroscopy
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Physics
Notes:
Resonance Raman spectra (RRS) of azobenzene, 4-aminoazobenzene, 4-methylaminobenzene and 4-dimethylaminoazobenzene in the solid state and in a range of solvents have been recorded. The RRS of the 4-aminoazobenzenes are much more solvent dependent than those of azobenzene. Their electronic absorption spectra suggest that their azo-nitrogens are strongly hydrogen bonded in aqueous media. The RRS were interpreted in terms of intra- and inter-molecular interactions. These molecules probably have a near-planar geometry in both the solid state and in aqueous media owing to intermolecular interactions. The intramolecular interactions of the nN=N orbitals with the π MOs tend to cause ring twisting about the axis of the N=N bond. The RRS of the aminoazobenzenes in non-polar solvents show differences from that of the powder, and these could only be attributed to the formation of non-planar structures.
Additional Material:
5 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/jrs.1250180113
