The orientations of the 13C chemical shift tensors in undoped cis-and tram-polyacetylene have been determined from the chemical shift-dipolar two-dimensional powder patterns observed in rotating samples.
Determination of the orientation of the 13C chemical shift tensor of undoped trans-polyacetylene
β Scribed by A. Manenschijn; M.J. Duijvestijn; J. Smidt; R.A. Wind; C.S. Yannoni; T.C. Clarke
- Publisher
- Elsevier Science
- Year
- 1984
- Tongue
- English
- Weight
- 315 KB
- Volume
- 112
- Category
- Article
- ISSN
- 0009-2614
No coin nor oath required. For personal study only.
π SIMILAR VOLUMES
The chemical shielding tensors and their direction cosines of the "C nuclei in a single crystal of methyl cr-D-glucopyranoside were determined by the high-resolution solid state n.m.r. technique. The results were used to assign the 13C cross-polarization, magic angle spinning (c.p.-m.a.s.) spectrum
The semi-empirical bond polarization theory is applied to the calchemical calculations on the IGLO (3), GIAO (4), or culation of 13 C chemical-shift tensors. This method allows prediction LORG (5) level must be performed if chemical-shift tensors of shift tensors with deviations from experiment comp
The two-dimensional powder pattern for isotactic polypropylene in a sample rotating at an off-magic angle has been measured and the chemical shift principal values and principal axis directions for each of the CH, CH, and CH, carbons, together with their C-H bond lengths, have been determined. KEY W