Issue 22, 2000

The role of molecular shape and axial symmetry in the solid state molecular dynamics of metal carbonyl compounds included in cyclodextrin cavities

Abstract

13C CP/MAS NMR spectra of the metal carbonyl complexes Cr(CO)6, Fe(CO)5 and Mn2(CO)10 included in β- and γ-cyclodextrin (CD) cavities have been studied in the temperature range 133 to 423 K. Cr(CO)6 molecules reorient effectively isotropically within γ-cyclodextrin, Fe(CO)5 molecules in β-cyclodextrin reorient effectively isotropically and show rapid axial–equatorial exchange, but Mn2(CO)10 in the super-cage defined by two γ-cyclodextrin molecules shows MAS sidebands at lower temperatures indicative of a more restricted motion such as molecular gyration. The important role of guest and host molecular shape and symmetry match in the reorientational dynamics of the metal carbonyls is discussed.

Article information

Article type
Paper
Submitted
29 Jun 2000
Accepted
02 Oct 2000
First published
27 Oct 2000

J. Chem. Soc., Dalton Trans., 2000, 4075-4077

The role of molecular shape and axial symmetry in the solid state molecular dynamics of metal carbonyl compounds included in cyclodextrin cavities

H. C. Canuto, S. J. Heyes, S. Aime, R. Gobetto and F. Napolitano, J. Chem. Soc., Dalton Trans., 2000, 4075 DOI: 10.1039/B005226O

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