PROTONATION OF FULLY AROMATIC BETACARBOLINES IN HIGHLY CONCENTRATED SULFURIC-ACID MEDIA

Authors
CARMONA C MUNOZ MA GUARDADO P BALON M
Citation
C. Carmona et al., PROTONATION OF FULLY AROMATIC BETACARBOLINES IN HIGHLY CONCENTRATED SULFURIC-ACID MEDIA, Journal of physical organic chemistry, 8(8), 1995, pp. 559-562
Citations number
13
Categorie Soggetti
Chemistry Physical","Chemistry Inorganic & Nuclear
Journal title
Journal of physical organic chemistry → ACNP
ISSN journal
08943230
Volume
8
Issue
8
Year of publication
1995
Pages
559 - 562
Database
ISI
SICI code
0894-3230(1995)8:8<559:POFABI>2.0.ZU;2-G
Abstract
The monocation-dication equilibria of 6-nitro and 6-sulphonic acid der ivatives of betacarboline (9H-pyrido[3,4-b]indole) were investigated m ostly by UV-visible absorption spectroscopy. Dications are formed in v ery highly concentrated sulphuric acid solutions (>15 M). Ionization c onstants, pK(a) values and solvation parameters obtained from the exce ss acidity method are reported. The unusually high m parameters are d iscussed and compared with other related data.