13C Chemical Shift Anisotropy, Proton Spin-Lattice Relaxation Time Measurements, and the Barriers to Rotation in Crystalline Pentacarbonyl(methyl)manganese(I) and Pentacarbonyl(methyl)rhenium(I) Complexes
✍ Scribed by Dominique Lafleur; Yining Huang; Denis F.R. Gilson; Ian S. Butler
- Publisher
- Elsevier Science
- Year
- 1994
- Tongue
- English
- Weight
- 139 KB
- Volume
- 108
- Category
- Article
- ISSN
- 0022-4596
No coin nor oath required. For personal study only.
✦ Synopsis
Proton spin-lattice relaxation times and ({ }^{13} \mathrm{C}) chemical shift anisotropy measurements have been made on the complexes pentacarbonyl(methyl)manganese(I) and -rhenium(I), (\mathrm{CH}{3} M(\mathrm{CO}){5}), (M=) (\mathrm{Mn}, \mathrm{Re})). The barrier to rotation of the methyl group in the manganese complex is (21.7 \mathrm{~kJ} \mathrm{~mole}^{-1}), and the chemical shift anisotropies are not averaged in either complex. The disorder that exists in these complexes is, therefore, probably a static disorder without overall molecular rotation. O 1994 Academic Press, Inc.