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.
Contact:+86+21-58956006 15800617331
Address:402 Room, 150# Cailun Road, Zhangjiang high tech park, Shanghai
Yurui(Shanghai)Chemical Co.,Ltd
Contact:0086 21-50456736
Address:No.3188 Xiupu Road,Shanghai
Hebei Tianxiang Biological & Pharmaceutical Co., Ltd
Contact:86-0312-6615158
Address:No 42 fazhan street qingyuan county
Contact:86-371-63655023
Address:No.85,jinshui road,zhengzhou,China
Shandong Xinhua Pharmaceutical Co.,Ltd
website:http://www.xhzy.com
Contact:+86-533-2196801
Address:1 lutai road,zhangdian dis,Zibo City
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
()
