Scalar spin-spin coupling constants of some organomanganese complexes, were evaluated by Mn(CO) 5-n (R)L n , lineshape analysis from 13C and 31P solution NMR spectra and from solid-state magic angle spinning spectra showing Ðrst-order splitting. Consistent results were obtained for favourable comple
55Mn, 13C coupling constants of some σ- and π-organomanganese complexes
✍ Scribed by Vladimir Torocheshnikov; Daniel Rentsch; Wolfgang von Philipsborn
- Book ID
- 102527833
- Publisher
- John Wiley and Sons
- Year
- 1994
- Tongue
- English
- Weight
- 439 KB
- Volume
- 32
- Category
- Article
- ISSN
- 0749-1581
No coin nor oath required. For personal study only.
✦ Synopsis
Abstract
^55^Mn, ^13^C coupling constants of σ‐ and π‐organomanganese pentacarbonyl, tetracarbonylphosphine and tricarbonyl complexes were determined by lineshape analysis of the ^13^CO and ^13^C(R) signals (R = alkyl, acyl or aryl) using the iterative lineshape fitting program QUADR. The ^1^J(^55^Mn, ^13^C) data are in the range 29–47 Hz for MnCO bonds and 2–28 Hz for MnR bonds. The ^55^Mn chemical shifts and linewidths are also reported.
📜 SIMILAR VOLUMES
The attachment of an ester group at C-4 (1) and lactone bridges between C-6 and C-8 (1); C-2 and C-4, C-6 and C-8 (2); C-4 and C-6 (4) resulted in C-4, C-5 and C-6 showing similar chemical shifts in all three structures. In Diosbulbins A (1) and B (Z), C-12 bearing the equatorial furan ring is in an
## Abstract Measurement of the ^13^C NMR spectra of the bridgehead nitro compounds __1a–5a__ has been performed. It is found that one‐bond ^13^C^15^N coupling is not necessarily a reflection of the degree of s character of the bridgehead carbon exocyclic bonding orbital. Although the magnitude of