TY - JOUR
T1 - A study of some biphenylamines
T2 - Part I. The electronic spectra in acidic solvents of some biphenylamines
AU - Dieteren, H.M.L.
AU - Koningsberger, C.
PY - 1963
Y1 - 1963
N2 - The K‐bands in the ultraviolet absorption spectra of meta and para substituted biphenylamines, dissolved in acidic media, appear to be essentially identical with each other and with that of their parent compound, biphenyl. Apparently the electronic interaction of the two aromatic rings is not markedly disturbed by the mere presence of positively charged ammonium groups, provided the molecules are able to assume a planar structure. As can be expected, however, appreciable hypsochromic shifts of the K‐bands become manifest when one or more of these groups are located at the ortho positions. Moreover, a buttressing effect is observed in the case where ammonium groups are present simultaneously in adjoining meta positions. A discussion of results takes into account both steric and electrostatic factors operating between the groups involved.
AB - The K‐bands in the ultraviolet absorption spectra of meta and para substituted biphenylamines, dissolved in acidic media, appear to be essentially identical with each other and with that of their parent compound, biphenyl. Apparently the electronic interaction of the two aromatic rings is not markedly disturbed by the mere presence of positively charged ammonium groups, provided the molecules are able to assume a planar structure. As can be expected, however, appreciable hypsochromic shifts of the K‐bands become manifest when one or more of these groups are located at the ortho positions. Moreover, a buttressing effect is observed in the case where ammonium groups are present simultaneously in adjoining meta positions. A discussion of results takes into account both steric and electrostatic factors operating between the groups involved.
UR - http://www.scopus.com/inward/record.url?scp=84982064937&partnerID=8YFLogxK
U2 - 10.1002/recl.19630820102
DO - 10.1002/recl.19630820102
M3 - Article
AN - SCOPUS:84982064937
SN - 0165-0513
VL - 82
SP - 5
EP - 16
JO - Recueil des Travaux Chimiques des Pays-Bas
JF - Recueil des Travaux Chimiques des Pays-Bas
IS - 1
ER -