C. Hall, J. H. Tucker, Sunny Y.F. Chu
Apr 20, 1993
Citations
0
Influential Citations
6
Citations
Journal
Journal of Organometallic Chemistry
Abstract
Abstract Multinuclear (1H, 13C and 89Y) NMR has been used to study complex formation in solution between the ferrocene-containing cryptand 1,1′(1,4,10-trioxa-7,13-diazacyclopentadecane-7,13-diyldicarbonyl)ferrocene (1) and yttrium perchlorate (2). The results show that in acetonitrile as solvent, two complexes (3a and 3b) can be formed, with stoichiometries of 1:1 and 2:1 (ligand: Y3+) respectively, both of which involve coordination of the cation by a cis configuration of the amide carbonyl groups resulting in a plane of symmetry in each complex that is not present in the host cryptand. Exchange between the complexes, and between the complexes and free yttrium, is slow on the NMR time scale, and the yttrium complexes show an unusual two-bond coupling between 89Y and the carbon atoms of the amide carbonyl groups.