Symmetry of Hydrogen Bonds: Application of NMR Method of Isotopic Perturbation and Relevance of Solvatomers

Autor: Charles L. Perrin

Publikováno v: Molecules, Vol 28, Iss 11, p 4462 (2023)

Short, strong, symmetric, low-barrier hydrogen bonds (H-bonds) are thought to be of special significance. We have been searching for symmetric H-bonds by using the NMR technique of isotopic perturbation. Various dicarboxylate monoanions, aldehyde eno

Externí odkaz: https://doaj.org/article/d1ed3b874ae544f8893acd6cfc55a0a3

Malonic Anhydrides, Challenges from a Simple Structure

Autor: Charles L. Perrin

Publikováno v: The Journal of organic chemistry, vol 87, iss 11

After many years of unsuccessful attempts, monomeric malonic anhydrides were prepared by ozonolysis of ketene dimers, a procedure validated by model studies. The structure proof relied most heavily on IR absorption at 1820 cm-1 and a Raman band at 19

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::65d569a6e848ef136a402def3a4ac480
https://doi.org/10.1021/acs.joc.2c00453

ipso

Autor: Charles L. Perrin

Publikováno v: The Journal of Organic Chemistry. 86:14245-14249

On a substituted benzene ring the position that bears the substituent is designated as the ipso position. This Perspective presents the history behind that designation.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::86a0d361c3d87200e0ca12df640bb512
https://doi.org/10.1021/acs.joc.1c02128

Glossary of terms used in physical organic chemistry (IUPAC Recommendations 2021)

Autor: Charles L. Perrin, Israel Agranat, Alessandro Bagno, Silvia E. Braslavsky, Pedro Alexandrino Fernandes, Jean-François Gal, Guy C. Lloyd-Jones, Herbert Mayr, Joseph R. Murdoch, Norma Sbarbati Nudelman, Leo Radom, Zvi Rappoport, Marie-Françoise Ruasse, Hans-Ullrich Siehl, Yoshito Takeuchi, Thomas T. Tidwell, Einar Uggerud, Ian H. Williams

Publikováno v: Pure and Applied Chemistry, vol 94, iss 4
Perrin, C L, Agranat, I, Bagno, A, Braslavsky, S E, Fernandes, P A, Gal, J, Lloyd-jones, G C, Mayr, H, Murdoch, J R, Nudelman, N S, Radom, L, Rappoport, Z, Ruasse, M, Siehl, H, Takeuchi, Y, Tidwell, T T, Uggerud, E & Williams, I H 2022, ' Glossary of terms used in physical organic chemistry (IUPAC Recommendations 2021) ', Pure and applied chemistry, vol. 94, no. 4, pp. 353-534 . https://doi.org/10.1515/pac-2018-1010

This Glossary contains definitions, explanatory notes, and sources for terms used in physical organic chemistry. Its aim is to provide guidance on the terminology of physical organic chemistry, with a view to achieving a consensus on the meaning and

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ca66ccc111e35a67246f5b9ec5ba0e8e
https://escholarship.org/uc/item/2rx9m9pg

Comment on 'Topography of the free energy landscape of Claisen-Schmidt condensation: solvent and temperature effects on the rate-controlling step' by N. D. Coutinho, H. G. Machado, V. H. Carvalho-Silva and W. A. da Silva

Autor: Charles L Perrin

Publikováno v: Physical chemistry chemical physics : PCCP. 23(38)

The referenced article in PCCP presents calculations of solvent kinetic isotope effects that indicate that the rate-limiting step in base-catalyzed chalcone formation in aqueous solution becomes the second enolization. This disputes our previous conc

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b5f89b2f7a5a4d903751a78bf2586f43
https://pubmed.ncbi.nlm.nih.gov/34614051