Av. Yatsenko et al., AN INDO S STUDY OF THE 2ND PI-PI-ASTERISK TRANSITION IN THE SPECTRA OF 1,4-DIAMINO ANTHRAQUINONES RESPONSIBLE FOR THEIR GREEN HUE/, Dyes and pigments, 37(3), 1998, pp. 273-282
The INDO/S approach is used to study the structure/spectra relationshi
p for some N,N'-disubstituted 1,4-diaminoanthraquinones. The calculate
d intensity and position of the short-wavelength absorption band depen
d on the molecular conformation, in agreement with the experimental da
ta. The reflection spectra of crystalline 1,4-bisanilinoanthraquinone
and 1,4-bis(mesitylamino) anthraquinone are reported and the crystal s
tructure of the latter compound has been determined. (C) 1998 Elsevier
Science Ltd.