
Crystal Growth and Design p. 5763 - 5772 (2012)
Update date:2022-08-04
Topics:
Stilinovic, Vladimir
Kaitner, Branko
A series of 22 salts and co-crystals of gentisic acid and pyridine derivatives were synthesized and their crystal structures were studied by X-ray diffraction. The proton transfer was found to to be absent when the difference in pKa values was below 2, and it always occurred when it was above 2.5. The hydrogen bonds between the carboxylic group and pyridine nitrogen atom were found in all structures but one. These hydrogen bonds are shorter and apparently stronger in co-crystals than in salts. In the structures of salts the most significant intermolecular interaction is hydrogen bonding between anions, usually leading to chains or dimers, whereas in co-crystals the direct bonding between neutral gentisic acid molecules is mostly absent. Using 4,4′-bipyridine, two desmotropes were obtained in which the difference in hydrogen bonding of gentisic acid molecules leads to different protonation in two structures.
Contact:+86-158-05817090
Address:ROOM 9F, FLAT 2, GUODU DEVELOPING BLDG, No.182, ZHAOHUI ROAD
Huzhou City Linghu Xinwang Chemical Co.,Ltd.
Contact:86-572-3948695/3945236
Address:huzhou
HENAN NEW BLUE CHEMICAL CO.,LTD
website:http://www.newbluechem.com
Contact:86-371-55170693/55170694
Address:Zhengzhou International Trade New Territory,Jinshui District,Zhengzhou ,China
Shanghai Science Peptide Biological Technology Co.,ltd
website:http://www.scipeptide.com
Contact:+86-21-51099675
Address:No.8 Changyang Rd
Shangyu Sanhechemicals Co.,LTD.
Contact:86-0571-56696839
Address:Num.2952,Nanhuan Road,Binjiang District,Hangzhou,China
Doi:10.3390/md10081711
(2012)Doi:10.1002/adsc.201900995
(2019)Doi:10.1021/ol502977a
(2014)Doi:10.1021/acs.oprd.6b00220
(2016)Doi:10.1039/c2ob26211h
(2012)Doi:10.1002/ejoc.201200238
(2012)