Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases p. 3285 - 3294 (1984)
Update date:2022-08-04
Topics:
Cox, Brian G.
Troung, Nguyen van
Schneider, Hermann
The rate constants for exchange reactions between metal cryptate complexes, MCry1(n+), and a free cryptand, Cry2, have been determined in several solvents.Two mechanisms could be distinguished: a reaction proceeding via the free metal cation following dissociation of MCry1(n+), and a direct, bimolecular cation exchange between the two ligands.In solvents such as water, dimethylsulphoxide and dimethylformamide, which interact strongly with cations, the former pathway predominates for alkali-metal and alkaline-earth-metal cryptates.In poorly solvating media such as methanol and propylene carbonate, where dissociation rate constants are very low, bimolecular pathways make an important contribution to the overall exchange pathway.Exchange reactions of Ag(1+) cryptates show ligand-dependent rates and strong saturation effects in both methanol and dimethylsulphoxide.
Changzhou Ansciep Chemical Co.,Ltd.
Contact:+86 519 8630 5871
Address:A-710 Boan International, 8 East Guangdian Road,Wujin,Changzhou
Jinzhou Jiutai Pharmaceutical Co.,Ltd
Contact:+86-0416-5179890
Address:No.41, Taianli, Taihe District, Jinzhou, Liaoning
Contact:+33-5-34012600
Address:28 ZA des Pignès
Geen Chemical Technology Co., Ltd
Contact:86-769-21660847
Address:1408, Yingfeng Commercial Center, Nancheng District
Weifang Dongxing Chitosan Factory
website:http://dxchitosan.lookchem.com/
Contact:13475651157
Address:Weifang city ,shandong province
Doi:10.1002/jlcr.2580120303
(1976)Doi:10.1139/v68-058
(1968)Doi:10.1007/BF00906791
(1976)Doi:10.1002/chem.200600334
(2006)Doi:10.1016/S0040-4039(03)01865-3
(2003)Doi:10.1039/DT9760002165
()
