Center for Magnetic Resonance

For the first time at CMR Dr. Benjamin Koeppe has synthsized a mixture of deuterated freon gases (CDF3/CDF2Cl). Liquefied freons may serve as a solvent for extra low-temperature NMR experiments in liquid state (down to 100 K).
References:
1. B. Koeppe, J. Guo, P.M. Tolstoy, G.S. Denisov, H.-H. Limbach, “Solvent and H/D Isotope Effects on the Proton Transfer Pathways in Heteroconjugated Hydrogen-Bonded Phenol-Carboxylic Acid Anions Observed by Combined UV–vis and NMR Spectroscopy”, J. Am. Chem. Soc. 2013, 135, 7553-7566. DOI: 10.1021/ja400611x.
2. J. Guo, P.M. Tolstoy, B. Koeppe, N.S. Golubev, G.S. Denisov, S.N. Smirnov, H.-H. Limbach, “Hydrogen Bond Geometries and Proton Tautomerism of Homo-Conjugated Anions of Carboxylic Acids Studied via H/D Isotope Effects on 13C NMR Chemical Shifts”, J. Phys. Chem. A 2012, 116, 11180-11188. DOI: 10.1021/jp304943h.
3. D. Ajami, P.M. Tolstoy, H. Dube, S. Odermatt, B. Koeppe, J. Guo, H.-H. Limbach, J. Rebek Jr., “Compressed Hydrogen Bonds Isolated in Encapsulation Complexes”, Angew. Chem. Int. Ed. 2011, 50, 528-531. DOI: 10.1002/anie.201002182.
4. P.M. Tolstoy, P. Schah-Mohammedi, S.N. Smirnov, N.S. Golubev, G.S. Denisov, H.-H. Limbach, „Characterization of Fluxional Hydrogen-Bonded Complexes of Acetic Acid and Acetate by NMR: Geometries and Isotope and Solvent Effects”, J. Am. Chem. Soc., 2004, 126, 5621-5634. DOI: 10.1021/ja039280j.