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-
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0348086812
-
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note
-
2 = 0.378). In this paper the authors stressed that UB3LYP calculations correctly describe the homolytic cleavage of O-O peroxy bond with results "in good agreement with MR-AQCC results".
-
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15
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0001533537
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16
-
-
0347456844
-
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note
-
z nonbonding orbitals of the oxygen atoms.
-
-
-
-
17
-
-
0346826049
-
-
note
-
(b) Ring opening is accompanied by a formal rotation of the two 2p π electron pairs at the O atoms into the OCO plane.
-
-
-
-
18
-
-
0346826048
-
-
note
-
10 have described the radical intermediate 3-Me, but they only considered the less stable conformer (anti-3-Me). Overlooking the more stable conformer can lead, owing to the sizable difference in energy between the two forms, to wrong evaluation of activation and reaction free energy of reactions that involve this species.
-
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19
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0035860995
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Fokin, A. A.; Tkachenko, B. A.; Korshunov, O. I.; Gunchenko, P. A.; Schreiner P. S. J. Am. Chem. Soc. 2001, 123, 11248. This paper reports the reaction of DMD with highly strained carbon-carbon single bonds that goes through a diradicaloid TS with formation of a diradical intermediate that then fragments to afford the final products.
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more..
-
37
-
-
0347456843
-
-
note
-
17a we did not perform energy correction by removing spin contamination. This might mean that the "true" energy of diradicaloid TSs is slightly lower than that here reported.
-
-
-
-
38
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-
0000320783
-
-
Rastelli, A.; Bagatti, M.; Gandolfi, R. J. Am. Chem. Soc. 1995, 117, 4965.
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Arnaud, R.1
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Vallée, Y.5
Barone, V.6
-
43
-
-
0346195438
-
-
note
-
Specific and bulk solvation have no appreciable effect on geometry and does not improve wave function stability of TS conc-5a. Also the wave function of concerted TS for the reaction of methyl-(trifluoromethyl)dioxirane with methane was found to be instable (see the Supporting Information).
-
-
-
-
44
-
-
0030768537
-
-
"Molecule induced homolysis" or "molecule induced radical formation" indicate a process in which a radical pair is formed by reaction between two closed shell molecules. Rüchardt, C.; Gerst, M.; Ebenhoch, J. Angew. Chem., Int. Ed. Engl. 1997, 36, 1406.
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Rüchardt, C.1
Gerst, M.2
Ebenhoch, J.3
-
47
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0034692380
-
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(a) Ogliaro, F.; Harris, N.; Cohen, S.; Filatov, M.; de Visser, S. P.; Shaik, S. J. Am. Chem. Soc. 2000, 122, 8977.
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, pp. 8977
-
-
Ogliaro, F.1
Harris, N.2
Cohen, S.3
Filatov, M.4
De Visser, S.P.5
Shaik, S.6
-
48
-
-
0037123293
-
-
(b) Musaev, D. G.; Basch, H.; Morokuma, K. J. Am. Chem. Soc. 2002, 124, 4135.
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, pp. 4135
-
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Musaev, D.G.1
Basch, H.2
Morokuma, K.3
-
49
-
-
0348086801
-
-
note
-
1,2 One can reasonably argue that their decomposition should be faster than their formation, however, as suggested by a referee, further careful control experiments are in order given that this point is critical for the "perpedicular" mechanism.
-
-
-
-
50
-
-
0346195440
-
-
note
-
4 During such a short time the two radicals must reorient and their radical centers must approach to each other at a distance of ≊ 3 Å so that bonding can begin. This task might probably be achieved only if the energy delivered on the descent from the TS concentrates in the appropriate degree of freedom.
-
-
-
-
51
-
-
0348086807
-
-
note
-
1 = 1.371 Å).
-
-
-
-
52
-
-
0037012442
-
-
A mechanism that looks like this one has been advanced for alkane hydroxylation with methane monooxygenase on the basis of molecular dynamic simulations. Guallar, V.; Gherman, B. F.; Miller, W. H.; Lippard, S. J.; Friesner, R. A. J. Am. Chem Soc. 2002, 124, 3377.
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J. Am. Chem Soc.
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, pp. 3377
-
-
Guallar, V.1
Gherman, B.F.2
Miller, W.H.3
Lippard, S.J.4
Friesner, R.A.5
-
53
-
-
0346195439
-
-
note
-
For example, as suggested by a reviewer, the energy minimum that corresponds to the radical pair might be the result of an overestimation of its stability by the UB3LYP method.
-
-
-
-
54
-
-
0347456839
-
-
note
-
34b that of a one step (that is, without intermediates) borderline between concerted and non concerted mechanism.
-
-
-
-
56
-
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0035802906
-
-
Freccero, M.; Gandolfi, R.; Sarzi-Amadè, M.; Rastelli, A. Tetrahedron 2001, 57, 9843.
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-
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Freccero, M.1
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Rastelli, A.4
-
57
-
-
0346826044
-
-
note
-
37 Consequently in a mechanism with the 1 → 2 ring opening followed by the attack of 2 on alkane, the former unimolecular reaction would be the rate determining step in striking contrast with the observed second-order kinetics and isotope effects.
-
-
-
-
59
-
-
0346195437
-
-
note
-
One should remember that IRC traces the minimum energy path and not real trajectories. Consequently, it is not surprising that IRC following from TS rad,perp-5 (the dioxirane moiety of which exhibits a geometry very similar to that of 2) toward the reactants moves along the path that involves minor electronic and geometric changes, namely that one leading to 2 plus methane. Only molecular dynamic studies can probably shed light on the possible direct origin of TS rad,perp from reactants.
-
-
-
-
61
-
-
0346195429
-
-
note
-
2a
-
-
-
-
62
-
-
0346195430
-
-
note
-
2b A referee suggested that reaction of secondary C-H bond could represent an artifact due to the onset of radical DMD decomposition over the long reaction times. As a rule, e.g., reactions of DMD with 1,2-dimethylcyclohexanes and decalins, only attack at the tertiary C-H was observed.
-
-
-
-
63
-
-
0346195428
-
-
note
-
acetone = 22.24.
-
-
-
-
64
-
-
0348086798
-
-
note
-
13 have already emphasized, by studying the reaction of DHD with acetaldehyde (as model for acetone), that the presence of acetone as solvent is compatible with the concerted mechanism.
-
-
-
|