Solvent effects in nuclear magnetic resonance spectroscopy solvent shifts induced by benzene in amines
โ Scribed by D.J. Barraclough; P.W. Hickmott; O. Meth-Cohn
- Publisher
- Elsevier Science
- Year
- 1967
- Tongue
- French
- Weight
- 185 KB
- Volume
- 8
- Category
- Article
- ISSN
- 0040-4039
No coin nor oath required. For personal study only.
โฆ Synopsis
Wnivereity of Salford, galford, Lance.) (Received in UK 27 July 1967)
It is now ~011 known1 that benzene ooueee coneiderable Bolvent shifte of pi-&m reacnauoea (A-TC6D6 -fCCla) with respect to IYI 'inert' solvent in WWD spectra. The origin of suoh solvent shifts ie believed to lie in the ability of ben5ene to aolvate an araaatic or aliphatic eolute moleoule at electron defioient sites of looal dipolerr in a eteroepecific manner, the ehifta arirring due to the magnetic auia+ot.ropg of the benzene ring.
It has been suggested by William6 and co-workers1 that nonplenar collieion ocqplexes are formed, in which the JT-electron syrtem of beneene interacts in such a ra(y that the benzene
๐ SIMILAR VOLUMES
The C-18 and C-19 methyl resonances of 5a-androstane occur at s = 0.69 p.p.m. and 6~0.79 p.p.m. in deuteriochloroform solution (I) and at dzO.71 p.p.m. and 6=0.79 p.p.m. in benzene solution .\* It therefore appears likely that in the absence of polar functional groups, no preferred geometrical relat
132 Cyclopropane, unlike other cycloalkanes, is distinctly basic and strongly anisotropic 3 1 in both its magnetic susceptibility and its basicity. The magnetic anisotropy of cyclopropane derivatives is observed frequently in NMR spectra as the strong shielding of protons 495 located above the face