# NMR STUDY OF SOLVENT EFFECTS ON P-H COUPLING

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 Title: NMR STUDY OF SOLVENT EFFECTS ON P-H COUPLING Creators: Patton, H. W. Issue Date: 1961 Publisher: Ohio State University Abstract: The effects of solvents on NMR chemical shifts are well $known.^{1}$ Perceptible changes in spin coupling constants due to medium efforts are reported for a very few $systems.^{2}$ The few reported changes were observed for hydrogen atoms attached to adjacent carbon atoms and attributed to variation of nuclear spin coupling with dihedral angle. In this paper the P-H coupling constants (from proton resonance) for dialkyl hydrogen phosphites in various solvents are reported. Smile solvents increased the coupling and others decreased it with respect to the value for the neat liquid. Monotonic variation with concentration was observed. The solvent effects described are of a different kind from those previously reported in that they involve couplings between atoms directly bonded together. Description: $^{1}$A. A. Bothner-By, J. Mol. Spectroscopy, 5, 52 (1960). $^{2}$E. B. Whipple, J. H. Goldstein and C. R. McClure, J. Am. Chem. Soc., 82, 3811 (1960). Author Institution: Research Laboratories, Tennessee Eastman Company URI: http://hdl.handle.net/1811/8079 Other Identifiers: 1961-G-4