Barrier heights for P-C bond homolysis in P-hydroxy-P-methyl-P,P-dioxophosphoranyl and P,P,Ptrihydroxy-P-methylphosphoranyl were calculated using well correlated levels of electronic structure theory. The best estimate for the difference in barriers between the two indicates that homolysis is more f
31P CIDNP in the reactions of phosphoranyl radicals
โ Scribed by Ya. A. Levin; A. V. Il'yasov; E. I. Goldfarb; E. I. Vorkunova
- Publisher
- John Wiley and Sons
- Year
- 1973
- Tongue
- English
- Weight
- 419 KB
- Volume
- 5
- Category
- Article
- ISSN
- 0749-1581
No coin nor oath required. For personal study only.
โฆ Synopsis
Abstract
The polarisation of phosphorus nuclei (^31^P CIDNP) during the free radical reactions of triakyl and triaryl phosphites proceeding via intermediate phosphoranyl radicals is discussed.
๐ SIMILAR VOLUMES
## Abstract The PMR spectrum recorded during the reaction of __tert__โbutylmagnesium chloride with __p__โchlorophenyl diazonium tetrafluoborate shows the CIDNP effect in the spectra of the the reaction products. Enhanced absorption and emission (the multiplet effect) has been observed for the proto
## Abstract Chemical polarisation of ^31^P nuclei was discovered and quantitatively measured in the peroxideโphosphite system. The qualitative interpretation of the net polarisation of ^31^P nuclei and of its sign in the products of the radical reactions in the presence of phosphites is given withi
## Abstract Thermal decomposition of 4โdiazoโ2,6โdiโ__tert__โbutylโ2, 5โcyclohexadienโ1โone in perhalogenated solvents has been investigated. The decomposition reaction proceeds via a carbene intermediate first to a singlet and then to an effectively triplet free encounter radical pair formed in a
## Abstract By using the ESR and CIDNP methods the formation of free radicals in the reaction of nucleophilic and electrophilic substitution is proved. The role of free radicals in the mechanism of these reactions is discussed.
Chemical-shift-tensor parameters retrieved from solid-effectively asymmetric s tensors have been reported, although with differing values of s ii . This undoubtedly reflects state NMR spectral data convey both structural and molecular implications, and efforts are continually devoted to the the diff