Issue 2, 1999

Kinetically inert cryptate systems: solid state and solution NMR studies

Abstract

Mononuclear cryptates of Pb2+, Cd2+ and Hg2+ with the small host 1,4,7,10,13,16,21,24-octaazabicyclo[8.8.8]hexacosa-4,6,13,15,21,23-hexaene (imBT) showed satellite peaks in 1H NMR solution spectra throughout the accessible (–40 to +70 °C) fluid range of solvents used indicating kinetic inertness toward decomplexation. Solid-state MAS NMR studies were made on these cryptates and on dinuclear silver(I) and copper(I) analogues, in the latter case establishing coupling of 63,65Cu to 15N. A crystal structure determination of the mercury cryptate showed a symmetrical six-co-ordinate site for Hg2+ with all imino nitrogens co-ordinated, consistent with the observation, for the isomorphous cadmium(II) complex, of a 13-line 113Cd resonance in the CP MAS NMR spectrum.

Supplementary files

Article information

Article type
Paper

J. Chem. Soc., Dalton Trans., 1999, 229-236

Kinetically inert cryptate systems: solid state and solution NMR studies

D. C. Apperley, W. Clegg, S. Coles, J. L. Coyle, N. Martin, B. Maubert, V. McKee and J. Nelson, J. Chem. Soc., Dalton Trans., 1999, 229 DOI: 10.1039/A806791K

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