𝔖 Bobbio Scriptorium
✦   LIBER   ✦

A Karplus-type relationship for the vicinal coupling 3J(CCCP) in phosphonates

✍ 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

No coin nor oath required. For personal study only.

✦ 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.


πŸ“œ SIMILAR VOLUMES


Karplus-type dihedral angle dependence f
✍ Terence N. Mitchell; Bernd Kowall πŸ“‚ Article πŸ“… 1995 πŸ› John Wiley and Sons 🌐 English βš– 286 KB

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

1H NMR Study of the Conformation of Meta
✍ M. Luisa Jimeno; JosΓ© Elguero; Daniel Carmona; M. Pilar Lamata; Emilio San JosΓ© πŸ“‚ Article πŸ“… 1996 πŸ› John Wiley and Sons 🌐 English βš– 318 KB πŸ‘ 2 views

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

Experimental Evidence for the Breakdown
✍ Teodor Parella; Francisco SΓ‘nchez-Ferrando; Albert Virgili πŸ“‚ Article πŸ“… 1997 πŸ› John Wiley and Sons 🌐 English βš– 249 KB πŸ‘ 1 views

Vicinal 1H, 13C coupling constants were measured for rigid unsaturated 1HÈCÈCx13C 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