ISSN:
0894-3230
Keywords:
Organic Chemistry
;
Physical Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Physics
Notes:
The orientation of benzoic acid and terephthalic acid on alumina was ascertained by IR measurements. Benzoic acid was chemisorbed as a carboxylate anion with a vertical conformation of the benzene ring (0 〈 θ 〈 1.0) and as a mixture of the anion and the acid (1.0 〈 θ). Terephthalic acid was chemisorbed as a mixture of monocarboxylate anion (hydrogenterephthalate) and dicarboxylate anion (0 〈 θ 〈 0.3), as the monocarboxylate anion with a vertical conformation of benzene ring (0.3 〈 θ 〈 1.0) and a mixture of the monocarboxylate anion and terephthalic acid (1.0 〈 θ). The carboxyl group of expected hydrogenterephthalate adsorbed through the carboxylate anion on alumina (θ = 0.8 : 0.37 mmol g-1 alumina) readily reacted with dimethyl sulphate to form monomethyl terephthalate selectively.
Additional Material:
7 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/poc.610040605
