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Solvent Exchange on Magnesium([15]Crown‐5) Complexes—a First‐ and Second‐Order Reaction
Author(s) -
Dickert Franz L.,
Waidhas Manfred F.
Publication year - 1985
Publication title -
angewandte chemie international edition in english
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 0570-0833
DOI - 10.1002/anie.198505751
Subject(s) - chemistry , solvent , magnesium , inorganic chemistry , inert , metal , molecule , ion exchange , metal ions in aqueous solution , coordination complex , ion , organic chemistry
The mobility of solvate molecules has been investigated NMR spectroscopically on the hydrophobic metal complex 1 in inert solvents. It was possible, for the first time, to observe how the solvent exchange converts from a reaction of second order into one of first order on increasing the concentration. DMF‐exchange in 1 is 10 4 times slower than in [Mg(DMF) 6 ] 2+ this can be attributed to an increased interaction between Mg 2+ and DMF by the coordination of [15]crown‐5. This finding is of interest in connection with the transport of ions by biological membranes.