Basicities of selected quinoxalines

Journal Article · Fri Oct 01 04:00:00 EDT 1982 · J. Chem. Eng. Data; (United States)

DOI:https://doi.org/10.1021/je00030a032· OSTI ID:5683003

Markgraf, J H; Blatchly, R A; Huffadine, A S; Peake, B M

As part of a continuing investigation of the relationship between the structure and physical properties of nitrogen heterocyclic systems, we were interested in the basicities of selected quinoxalines and the hyperfine splitting patterns for the corresponding anion radicals. For this study the pK /SUB a/ values were needed for the conjugate acids of 2, 3, 6, 7-tetramethylquinoxaline (1) and dibenzo (f,h) quinoxaline (5). Accordingly, the basicities were determined by potentiometric titration for the series of quinoxalines reported. This method has established that half-neutralization potentials (HNPs) and apparent acid dissociation constants (pK /SUB a/ ) are linearly related.

• Research Organization: Department of Chemistry, Williams College, Williamstown, Massachusetts, 01267
• OSTI ID: 5683003
• Journal Information: J. Chem. Eng. Data; (United States), Journal Name: J. Chem. Eng. Data; (United States) Vol. 27:4; ISSN JCEAA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400301* -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
ANIONS
AROMATICS
AZAARENES
AZINES
CHARGED PARTICLES
HETEROCYCLIC COMPOUNDS
IONS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PH VALUE
POTENTIOMETRY
PYRIDINES
QUINOLINES
TITRATION