โ Scribed by M. Attimonelli; O. Sciacovelli
No coin nor oath required. For personal study only.
The ^1^H n.m.r. spectra of two naphthalene derivatives have been completely analysed. The advantages of the INDOR technique have been illustrated in the determination, magnitudes and signs, of small couplings in complex spin systems. A splitting of 0.07 Hz has been resolved in the 100 MHz spectrum of 1,2โdichloroโ3 nitronaphthalene. The signs of the interโring coupling constants alternate with the number of intervening bonds.
๐ SIMILAR VOLUMES
## Abstract INDOR experiments on heptahelicene have revealed the existence of positive ^5^__J__ (__epi__), negative ^4^__J__ (__peri__) and |^4^__J__| (__peri__) crossโring couplings.
## Abstract PMR parameters of some methylene substituted oxiranes are obtained from INDOR experiments on the ABXMN spin systems. Compounds investigated include safrolโ and bromosafrol epoxide and ฮฒโphenoxypropylene oxide. For the latter compound all the relative signs (except for some long range co
An analysis of the 'H and 19F NMR spectra of 2-fluoronaphthalene was performed. 'H-19F inter-ring coupling constants were found to be positive over an even number of intervening bonds between the coupled nuclei and negative over an odd number. Such a sign alternation was based on a positive value fo