In compounds of the type Me,SnCH,CHRSnMe, and Me,SiCH,CHRSnMe, , there is a linear relationship between ,J(H,H) and 3J(119Sn,1'9Sn) or 3J(119Sn,29Si), respectively, thus providing unequivocal evidence for a Karplus-type behaviour for the coupling constants 'J(' 19Sn,119Sn) and 3J("9Sn,29Si). Prelimi
A Karplus-type relationship for the vicinal coupling 3J(CCCP) in phosphonates
β Scribed by Joachim Thiem; Bernd Meyer
- Publisher
- John Wiley and Sons
- Year
- 1978
- Tongue
- English
- Weight
- 174 KB
- Volume
- 11
- Category
- Article
- ISSN
- 0749-1581
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β¦ Synopsis
The complete assignment of the I3C N M R spectrum of a conformationally rigid camphane phosphonate derivative leads to a Karplus-type function for the vicinal 'J(CCCP) coupling constants in phosphonates. The general applicability of this relationship is demonstrated.
π SIMILAR VOLUMES
The complete analysis of the 'H NMR spectra of [ (C,Me,)lr(glycinate)CI] and [ (C,Me,)Ir(N-methyl-g1ycinate)Clj provide information for the conformational analysis of the five-membered N-C-C-0-Ir ring. A Karplus relationship has been established for these metallacycles [ 3J(H,H) = 8.9 cos' 4 -1.0 c
Vicinal 1H, 13C coupling constants were measured for rigid unsaturated 1HΓCΓCx13C molecular frameworks at natural abundance. As a general trend, an empirical range of 4.5-6.5 Hz is observed independent of the value of the dihedral angle between the CH bond and the plane of the double bond. Furthermo