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Contreras, Rubén Horacio
139
Magnetic Resonance in Chemistry
22
"Proton deshielding by spatial proximity: An experimental and theoretical study for ortho‐substituted anisoles" (1985) Contreras, R.H.; Ferraro, M.B.; de Kowalewski, D.G.; Díaz, L. Magnetic Resonance in Chemistry. 23(5):296-300
"Analysis of unusual 13C77Se couplings in the 13C NMR spectra of selenoimidates" (1986) Contreras, R.H.; de Azúa, M.C.R.; Giribet, C.G. Magnetic Resonance in Chemistry. 24(8):675-678
"Theoretical IPPP analysis of 13C‐31 P through‐space indirect couplings in phosphorus‐substituted alkenes" (1987) Diz, A.C.;Giribet, C.G.;de Azúa, M.C.R. (...)Aucar, G.A. Magnetic Resonance in Chemistry. 25(10):883-888
"Fluorine deshielding in the proximity of a methyl group. An experimental and theoretical study" (1991) Gribble, G.W.;Keavy, D.J.;Olson, E.R. (...)Contreras, R.H. Magnetic Resonance in Chemistry. 29(5):422-432
"Signs of 19F1H and 19F13C spin–spin coupling constants mainly transmitted through space" (1992) Rae, I.D.; Weigold, J.A.; Contreras, R.H.; Yamamoto, G. Magnetic Resonance in Chemistry. 30(11):1047-1050
"Analysis of long‐range through‐space couplings via an intramolecular hydrogen bond" (1993) Rae, I.D.; Weigold, J.A.; Contreras, R.H.; Biekofsky, R.R. Magnetic Resonance in Chemistry. 31(9):836-840
"Methoxy group conformation effects on 13C NMR parameters in 1‐cis‐methoxy‐ and 1‐trans‐methoxy‐1,3‐trans‐butadiene" (1994) Esteban, A.L.;Galache, M.P.;Diez, E. (...)Contreras, R.H. Magnetic Resonance in Chemistry. 32(4):199-204
"Relative signs of three-bond fluorine-carbon and four-bond fluorine-hydrogen couplings in 2-substituted fluorobenzenes" (1996) Rae, I.D.;Weigold, J.A.;De Kowalewski, D.G. (...)Contreras, R.H. Magnetic Resonance in Chemistry. 34(3):181-184
"Carbonyl 17O chemical shift in the proximity of a methyl group in amides: An experimental and theoretical study" (1996) Contreras, R.H.;Biekofsky, R.R.;Esteban, A.L. (...)Fabian, J.S. Magnetic Resonance in Chemistry. 34(6):447-452
"Experimental and theoretical study of the ethoxy group conformational effect on 13c chemical shifts in ortho-substituted phenetols" (1997) De Kowalewski, D.G.;Kowalewski, V.J.;Botek, E. (...)Facelli, J.C. Magnetic Resonance in Chemistry. 35(6):351-356
"Methyl β-substituent effect on NMR 17O chemical shifts in two-coordinated oxygen atoms: DFT GIAO and NBO and experimental studies" (1999) Peralta, J.E.;Contreras, R.H.;Taurian, O.E. (...)Kowalewski, V.J. Magnetic Resonance in Chemistry. 37(1):31-35
"Intramolecular electric field effect on a 1J(C,H) NMR spin-spin coupling constant. An experimental and theoretical study" (1999) De Kowalewski, D.G.;Kowalewski, V.J.;Peralta, J.E. (...)Díez, E. Magnetic Resonance in Chemistry. 37(3):227-231
"DFT-GIAO and DFT-NBO studies of the origin of 19F NMR shielding effects in alkyl fluorides" (1999) Adcock, W.; Lünsmann, D.; Peralta, J.E.; Contreras, R.H. Magnetic Resonance in Chemistry. 37(3):167-172
"Computation and analysis of 19F substituent chemical shifts of some bridgehead-substituted polycyclic alkyl fluorides" (2003) Adcock, W.; Peralta, J.E.; Contreras, R.H. Magnetic Resonance in Chemistry. 41(7):503-508
"Influence of σ-hyperconjugative interactions on 13C substituent chemical shifts: Experimental and theoretical study in 1-X,3-CH 3-bicyclo[1.1.1]pentanes" (2004) Contreras, R.H.;Esteban, A.L.;Díez, E. (...)Lochert, I.J. Magnetic Resonance in Chemistry. 42(SPLISS1):S202-S206
"Substituent effects on scalar J(13C, 13C) couplings in pyrimidines. An experimental and DFT study" (2004) De Kowalewski, D.G.;Díez, E.;Esteban, A.L. (...)Contreras, R.H. Magnetic Resonance in Chemistry. 42(11):938-943
"NMR spin-spin couplings involving nuclei in the neighborhood of a carbonyl group. 3JCH couplings in α-substituted acetamides" (2008) Pedersoli, S.;Dos Santos, F.P.;Rittner, R. (...)Tormena, C.F. Magnetic Resonance in Chemistry. 46(3):202-205
"On the unusual 2JC2-Hf coupling dependence on syn/anti CHO conformation in 5-X-furan-2-carboxaldehydes" (2008) Pérez, C.;Suardíaz, R.;Ortiz, P.J. (...)Contreras, R.H. Magnetic Resonance in Chemistry. 46(9):846-850
"Difference between 2JC2H3 and 2J C3H2 spin-spin couplings in heterocyclic five- and six-membered rings as a probe for studying σ-ring currents: A quantum chemical analysis" (2010) Contreras, R.H.; Dos Santos, F.P.; Ducati, L.C.; Tormena, C.F. Magnetic Resonance in Chemistry. 48(SUPPL 1):S151-S158
"19F chemical shifts, coupling constants and conformational preferences in monosubstituted perfluoroparacyclophanes" (2011) Ghiviriga, I.;Zhang, L.;Martinez, H. (...)Dolbier Jr., W.R. Magnetic Resonance in Chemistry. 49(3):93-105
"The electronic origin of unusually large nJFN coupling constants in some fluoroximes" (2013) Favaro, D.C.; Contreras, R.H.; Tormena, C.F. Magnetic Resonance in Chemistry. 51(6):334-338