1:1 Crystal complex of 2′,6′-dimethoxyflavone and 2,6-dimethoxybenzoic acid. Relationship of pKa to x-ray hydrogen bond data

• Published in: Journal of physical organic chemistry Vol. 11; no. 10; pp. 751 - 755
• Main Authors: Wallet, J.-C., Molins, E., Miravitlles, C.
• Format: Journal Article
• Language: English
• Published: Chichester, UK John Wiley & Sons, Ltd 01.10.1998
• Subjects: 2′,6′‐dimethoxyflavone–2,6‐dimethoxybenzoic acid complex; 6-dimethoxybenzoic acid complex; 6′-dimethoxyflavone-2; crystal structure; hydrogen bonds; pKa values
• ISSN: 0894-3230; 1099-1395
• DOI: 10.1002/(SICI)1099-1395(1998100)11:10<751::AID-POC16>3.0.CO;2-R

The crystal structure of the 2′,6′‐dimethoxyflavone–2,6‐dimethoxybenzoic acid complex was determined. Owing steric hindrance of the methoxy groups, the two H‐bonded molecules are twisted. Earlier results were used to establish a relationship between the pKa values of different acids and their hydrogen bond distances in complexes with 2′,6′‐dimethoxyflavone. © 1998 John Wiley & Sons, Ltd.