The Determination of Association Constants of Na+, K+, Mg2+and Ca2+Complexes with 1,4,7,10-Tetraoxacyclododecane,(12.Crown.4) in Doh by the Aid of13C Dipole-Dipole Relaxation Time Measurements
- 1 January 1987
- journal article
- research article
- Published by Taylor & Francis in Spectroscopy Letters
- Vol. 20 (12) , 983-988
- https://doi.org/10.1080/00387018708081603
Abstract
The stabilities of some complexes of 1,4,7,10-tetraoxacyclo -dodecane were determined from the 13C dipole-dipole relaxation time measurements of the free and complexed macrocyclic ligand in DOH. The association constants, Ka were obtained from the relationship of Pc = (1/Tobs 1 - 1/T10)/(1/T1 0- 1/T10) in which T1 0 and T10 are of the relaxation times of complexed and the free ligands respectively and, Pc is the complexed ligand fraction. Ka values found as described for the above cations were very a much in agreement. with the recently reported similar studies.Keywords
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