Ground and excited states of naphthalene–water (naphtha–W6) clusters: a computational study

RSC Advances ◽  
2015 ◽  
Vol 5 (36) ◽  
pp. 28281-28291 ◽  
Author(s):  
Divya Sharma ◽  
Martin J. Paterson
Keyword(s):  
Excited States ◽  
Computational Study ◽  
Dft Study

An MP2 and DFT study of the structures of naphthalene–water hexamer clusters has been performed for both the prism and cage forms of the cluster.

scholarly journals Computational study of productive and non-productive cycles in fluoroalkene metathesis

2015 ◽  
Vol 11 ◽  
pp. 2150-2157 ◽  
Author(s):  
Markéta Rybáčková ◽  
Jan Hošek ◽  
Ondřej Šimůnek ◽  
Viola Kolaříková ◽  
Jaroslav Kvíčala
Keyword(s):  
Computational Study ◽  
Catalytic Cycle ◽  
Dft Study ◽  
Cross Metathesis ◽  
High Preference ◽  
The Cross

A detailed DFT study of the mechanism of metathesis of fluoroethene, 1-fluoroethene, 1,1-difluoroethene, cis- and trans-1,2-difluoroethene, tetrafluoroethene and chlorotrifluoroethene catalysed with the Hoveyda–Grubbs 2nd generation catalyst was performed. It revealed that a successful metathesis of hydrofluoroethenes is hampered by a high preference for a non-productive catalytic cycle proceeding through a ruthenacyclobutane intermediate bearing fluorines in positions 2 and 4. Moreover, the calculations showed that the cross-metathesis of perfluoro- or perhaloalkenes should be a feasible process and that the metathesis is not very sensitive to stereochemical issues.

scholarly journals Divergent Reactivity of Indole-Tethered Ynones with Silver(I) and Gold(I) Catalysts: A Combined Synthetic and Computational Study

Synthesis ◽  
2018 ◽  
Vol 50 (24) ◽  
pp. 4829-4836 ◽  
Author(s):  
Jason Lynam ◽  
Richard Taylor ◽  
William Unsworth ◽  
John Liddon ◽  
James Rossi-Ashton ◽  
...  
Keyword(s):  
Ring Opening ◽  
Computational Study ◽  
Dft Study ◽  
Migration Mechanism ◽  
Catalyst Systems

A combined synthetic and computational (DFT) study has been performed to account for the divergent reactivity of indole-tethered ynones when treated with Ag(I) and Au(I) catalysts. The two catalyst systems deliver spirocyclic indolenines and carbazoles, respectively, from the same precursors, with the reaction outcomes believed to be a result of differences in the rates of a key protodemetalation step. A ring-opening/ring-closing isomerisation process is proposed to enable the interconversion of spirocyclic and C-2 annulated indole intermediates, in contrast to the 1,2-migration mechanism tentatively proposed in previous studies.

The structures and stabilities of singlet and triplet dithiatriazines: a computational study

1988 ◽  
Vol 66 (9) ◽  
pp. 2279-2284 ◽  
Author(s):  
R. E. Hoffmeyer ◽  
W.-T. Chan ◽  
J. D. Goddard ◽  
R. T. Oakley
Keyword(s):  
Excited States ◽  
Electron Correlation ◽  
Computational Study ◽  
Geometry Optimization ◽  
Hartree Fock ◽  
Structural Distortions ◽  
Energy Gaps ◽  
Jahn Teller ◽  
Moller Plesset ◽  
Triplet Excited States

Ab initio molecular orbital and Møller–Plesset perturbation theory calculations have been carried out on two model dithiatriazines RCN3S2 (R = H, NH2). With geometry optimization and the inclusion of electron correlation both of these dithiatriazines are predicted to be ground state singlets. Both molecules have low-lying triplet excited states, with energy gaps of 6.6 (R = H) and 13.0 (R = NH2) kcal mol−1. The singlet dithiatriazines distort from high (C2v) to low (Cs) symmetry, and these changes are important in determining the relative energies of the singlet and triplet molecules. The structural distortions experienced by these molecules are related to Hartree–Fock and Jahn–Teller instabilities in other thiazene heterocycles.

A spectroscopic and computational study of the singlet and triplet excited states of synthetic β-functionalized chlorins

2003 ◽  
Vol 294 (3) ◽  
pp. 285-303 ◽  
Author(s):  
Christian Brückner ◽  
Jason R McCarthy ◽  
Heather W Daniell ◽  
Zeus D Pendon ◽  
Robielyn P Ilagan ◽  
...  
Keyword(s):  
Excited States ◽  
Computational Study ◽  
Triplet Excited States
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