## Recentty. the absolute values of the H and 19F spio-rot~~on constants in SiH4 , GeH C&F4 wore reported on the basis of n;<4ecular beam measurements. We note here a me 4r; CFQ, SiF4, afd od of determinmg the signs of the spin-rotation constants. Our results show that the proton spin-rotation co
Ab initioMO studies of nuclear spin-spin coupling constants in CH4, SiH4, AlH4−and GeH4systems
✍ Scribed by Anil C. Nair; P. Chandra
- Publisher
- Springer
- Year
- 1994
- Tongue
- English
- Weight
- 720 KB
- Volume
- 89
- Category
- Article
- ISSN
- 1432-2234
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Isokopic nuclear spti spin coupling constants have been e-&dated for ti possible couplings in HIO, NH3 and CH4 by two different double perturbation techniques. All calculations were performed employing bases of decors constructed with SCF canonical and, for H20, localized orbitals, produced by exten
## Abstract The ABX spin systems of the [mono‐^13^C]isotopomers with vinylic and phenyl __ipso__‐^13^C atoms of a number of symmetrical 1,4‐dihydro‐1,4‐diphenyl‐1λ^5^,4λ^5^‐diphosphinines were analysed. The substituent dependence of the absolute signs and magnitudes of ^2^__J__(PC) between the two