Current Developments in Communication Research

Borden, George A.

doi:10.1111/j.1460-2466.1965.tb01326.x

Cited by 4 publications

(2 citation statements)

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“…That is the reason why the two interallylic C-C bond lengths in TS 17 are considerably shorter than those in the Cope rearrangement of the hydrocarbon. 42 Further theoretical investigations could not find the boatlike metalla-Cope rearrangement of the rhena-1,5-hexadiene. All approaches to a boatlike transition structure led to TS 17.…”

Section: The Effect Of 15-electron Re(ph 3 ) 4 Replacing Ch On the Co...mentioning

confidence: 95%

Metalla-Cope Rearrangements: Bridging Organic and Inorganic Chemistry^†

Greer¹,

Hoffmann²

2010

J. Phys. Chem. A

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Density functional theory calculations are performed to explore both concerted chairlike and boatlike as well as stepwise mechanisms of the Cope rearrangement of two hypothetical metalladienes. An osma-1,5-hexadiene is designed by substituting CH(2) in 1,5-hexadiene by its isolobal analogue, 16-electron Os(PH(3))(4). The energy of activation corresponding to the rearrangement of osma-1,5-hexadiene involving the chairlike saddle point is computed as 37.4 kcal/mol, 3.9 kcal/mol above the energy barrier of the parent 1,5-hexadiene calculated with the same method and basis set, and is 4.5 kcal/mol below that of the boatlike pathway. In another isolobal replacement, the CH in 1,5-hexadiene is substituted by a 15-electron Re(PH(3))(3) fragment. Now the chairlike rearrangement of the rhenia-1,5-hexadiene has an E(a) value of 23.0 kcal/mol, 10.8 kcal/mol less than the energy barrier of the parent 1,5-hexadiene calculated at the same level of theory. The ring inversion of the chair and osma-chair diradical intermediates of the stepwise reaction pathway is also examined and is found in both cases to proceed through a very flat potential energy surface involving twist intermediates.

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Section: The Effect Of 15-electron Re(ph 3 ) 4 Replacing Ch On the Co...mentioning

confidence: 95%

Metalla-Cope Rearrangements: Bridging Organic and Inorganic Chemistry^†

Greer¹,

Hoffmann²

2010

J. Phys. Chem. A

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“…[14] Finally, very high instantaneous photon-photon luminosities appear to be technically feasible, [15] by running at correspondingly high instantaneous e + e − luminosities (higher than can be employed without beam disruption etc. in direct e + e − collision studies).…”

Section: Resultsmentioning

confidence: 99%

Determining the CP eigenvalues of the neutral Higgs bosons of the minimal supersymmetric model in γγ collisions

Gunion

Kelly

1994

Physics Letters B

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We determine the optimal laser and e + /e − energies and polarizations for directly determining the CP eigenvalue of each of the neutral Higgs bosons of the Minimal Supersymmetric Model via measurement of transverse polarization cross section asymmetry in back-scattered laser photon collisions. Approximate statistical significances are computed for the measurement of the CP eigenvalue as a function of Higgs mass and other parameters of the model.

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