Helmi Neuvonen

Electron-Withdrawing Substituents Decrease the Electrophilicity of the Carbonyl Carbon. An Investigation with the Aid of¹³C NMR Chemical Shifts, ν(CO) Frequency Values, Charge Densities, and Isodesmic Reactions To Interprete Substituent Effects on Reactivity

Helmi Neuvonen, Kari Neuvonen, Andreas Koch et al. · The Journal of Organic Chemistry · 2002 · 103 citations

Chemical Engineering, Engineering, Biochemistry +15

Evidence of Substituent-Induced Electronic Interplay. Effect of the Remote Aromatic Ring Substituent of Phenyl Benzoates on the Sensitivity of the Carbonyl Unit to Electronic Effects of Phenyl or Benzoyl Ring Substituents

Helmi Neuvonen, Kari Neuvonen, Paavo Pasanen · The Journal of Organic Chemistry · 2004 · 70 citations

Engineering, Proton-coupled Electron Transfer, Organic Chemistry +16

Substituent Influences on the Stability of the Ring and Chain Tautomers in 1,3-<i>O</i>,<i>N</i>-Heterocyclic Systems:  Characterization by¹³C NMR Chemical Shifts, PM3 Charge Densities, and Isodesmic Reactions

Kari Neuvonen, Ferenc Fülöp, Helmi Neuvonen et al. · The Journal of Organic Chemistry · 2001 · 60 citations

Engineering, Molecular Biology, Organic Chemistry +17

Substituent Cross-Interaction Effects on the Electronic Character of the CN Bridging Group in Substituted Benzylidene Anilines − Models for Molecular Cores of Mesogenic Compounds. A¹³C NMR Study and Comparison with Theoretical Results

Helmi Neuvonen, Kari Neuvonen, Ferenc Fülöp · The Journal of Organic Chemistry · 2006 · 56 citations

Correlation analysis of carbonyl carbon 13C NMR chemical shifts, IR absorption frequencies and rate coefficients of nucleophilic acyl substitutions. A novel explanation for the substituent dependence of reactivity

Helmi Neuvonen, Kari Neuvonen · Journal of the Chemical Society Perkin Transactions 2 · 1999 · 54 citations

Rate Coefficients, Electron Density, Engineering +14