NMR spin–lattice relaxation time measurements in organochalcogen compounds
- 1 March 1983
- journal article
- research article
- Published by Wiley in Magnetic Resonance in Chemistry
- Vol. 21 (3) , 196-198
- https://doi.org/10.1002/omr.1270210311
Abstract
1H and 77Se spin‐lattice relaxation times have been measured for the series of organochalcogen compounds MeE(CH2)nEMe (E=S, Se, n=0–3; E = O, n = 1, 2). The methyl and methylene proton T1 values decreased with increasing mass/size of the chalcogen and with increasing methylene chain length. The values are primarily due to intra‐ and inter‐molecular dipole‐dipole relaxation with proton‐proton cross‐relaxation effects playing a significant role. 77Se T1 values are dominated by spin rotation and chemical shielding anisotropy mechanisms, their relative importance depending on the size of the molecule and temperature of measurement.Keywords
This publication has 11 references indexed in Scilit:
- Proton spin-lattice relaxation rate studies. 1-Aryl-4,4-dimethyl-2-methylthio-2-imidazolin-5-onesMagnetic Resonance in Chemistry, 1980
- Nuclear magnetic resonance investigations of configurational nonrigidity in dinuclear platinum(IV) complexes. Part 2. Pyramidal inversion and novel fluxional rearrangements in [(PtXMe3)2(MeEEMe)](E = S or Se) complexesJ. Chem. Soc., Dalton Trans., 1980
- Selenium-77 relaxation time studies on compounds of biological importance: dialkyl selenides, dialkyl diselenides, selenols, selenonium compounds, and seleno oxyacidsJournal of the American Chemical Society, 1979
- Spin-lattice relaxation of 77Se in some organoselenium compoundsJournal of Magnetic Resonance (1969), 1978
- Selenium-77 relaxation time studies. Considerations regarding direct observation of selenium resonances in biological systemsJournal of the American Chemical Society, 1977
- Error analysis for optimized inversion recovery spin-lattice relaxation measurementsJournal of Magnetic Resonance (1969), 1977
- Spin–lattice relaxation in cross relaxed systems: AnisoleThe Journal of Chemical Physics, 1975
- Tate and Lyle Lecture. Spin–lattice relaxation: a fourth dimension for proton n. m. r. spectroscopyChemical Society Reviews, 1975
- Spin-lattice relaxation times of 13C satellites in proton nuclear magnetic resonance spectra and their use in determining molecular rotational diffusion constantsJournal of the Chemical Society, Faraday Transactions 2: Molecular and Chemical Physics, 1974
- Proton NMR Relaxation Effects. Cross-Relaxation Processes in Pure LiquidsThe Journal of Chemical Physics, 1968