Journal of Computational Chemistry

Cover image for Vol. 35 Issue 23

Edited By: Charles L. Brooks III, Masahiro Ehara, Gernot Frenking, and Peter R. Schreiner

Impact Factor: 3.835

ISI Journal Citation Reports © Ranking: 2012: 34/152 (Chemistry Multidisciplinary)

Online ISSN: 1096-987X

Associated Title(s): International Journal of Quantum Chemistry, Wiley Interdisciplinary Reviews: Computational Molecular Science

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Recently Published Articles

  1. Benchmarking dispersion and geometrical counterpoise corrections for cost-effective large-scale DFT calculations of water adsorption on graphene

    Marco Lorenz, Bartolomeo Civalleri, Lorenzo Maschio, Mauro Sgroi and Daniele Pullini

    Article first published online: 23 JUL 2014 | DOI: 10.1002/jcc.23686

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    The adsorption of water on graphene is computationally investigated via density functional theory combined with empirical corrections. This allows for going beyond the quality of classical or semiclassical simulations, while still keeping the computational costs under control. To model the water adsorption, we used 1 and 10 water molecules per cell, as well as a full coverage of the graphene surface. Additionally, we apply the same setup to hexagonal boron nitride supported graphene.

  2. Molecular dynamics simulations of ion solvation by flexible-boundary QM/MM: On-the-fly partial charge transfer between QM and MM subsystems

    Soroosh Pezeshki and Hai Lin

    Article first published online: 23 JUL 2014 | DOI: 10.1002/jcc.23685

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    Flexible-boundary QM/MM allows on-the-fly exchange of partial charges between the QM and MM subsystems in molecular dynamics. An average total charge of −0.9 e is observed for a chloride ion and its first solvation shell treated by QM, while on average the bulk water modeled by MM carries a total charge of −0.1 e.

  3. To be or not to be butterfly: New mechanistical insights in the Aza-Michael asymmetric addition of lithium (R)-N-benzyl-N-(α-methylbenzyl)amide

    Carlos T. Nieto, David Díez and Narciso M. Garrido

    Article first published online: 22 JUL 2014 | DOI: 10.1002/jcc.23694

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    The asymmetric Aza-Michael addition of homochiral lithium benzylamides to α,β-unsaturated esters represents an extended protocol to obtain enantioenriched β-amino esters. A QM/MM transition state protocol is presented, revising the original proposed mechanism. Theoretical results a Si/Re 99:1 diastereoselective ratio, in good agreement with experimental results, is reported. Two TS conformers in a “V-stacked” orientation of the amide's phenyl rings, differing in the THF molecule arrangement coordinated to lithium, are the most suitable TS geometries.

  4. Shape-based virtual screening with volumetric aligned molecular shapes

    David Ryan Koes and Carlos J. Camacho

    Article first published online: 22 JUL 2014 | DOI: 10.1002/jcc.23690

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    Volumetric aligned molecular shapes provide a way to screen libraries of molecular shapes that approaches the speed of the fastest shape-based methods and the accuracy of the most successful shape-based methods which are orders of magnitude slower. Volumetric aligned molecular shapes also offer a novel minimum/maximum shape constraint search that allows the user to precisely specify the desired shape and search millions of shapes in a fraction of a second.

  5. CCSD-CTOCD static dipole shielding polarizability for quantification of the chiral NMR effects in oxaziridine derivatives

    Stefano Pelloni and Inmaculada García Cuesta

    Article first published online: 22 JUL 2014 | DOI: 10.1002/jcc.23689

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    Chiral discrimination by NMR spectroscopy might be achieved through the pseudo-scalar derived from the dipole shielding polarizability tensor, which has opposite sign in each enantiomer and is zero for achiral molecules. An accurate theoretical description of the magnitude is of fundamental importance to be susceptible of being unequivocally confirmed by experiment. CCSD calculations of the pseudo-scalar in oxaziridine derivatives show important effects caused by the chiral nuclei 19F and 31P.