185380-16-9Relevant academic research and scientific papers
?-Face selectivities in nucleophilic additions to 2-endo-arylnorbornan-7-ones: the role of through-space electrostatic interactions
Mehta, Goverdhan,Khan, Faiz Ahmed,Mohal, Narinder,Namboothiri, I. N. Narayan,Kalyanaraman, P.,Chandrasekhar, Jayaraman
, p. 2665 - 2668 (2007/10/03)
Experimental diastereoselectivities in hydride reduction of 2-endo-arylnorbornan-7-ones and computed transition state energetics reveal that the facial selectivity in these systems is predominantly determined by repulsions between the approaching nucleoph
Direct Measurements of the Absolute Rates of Dimerization and Capture of the 2-Isopropylidenecyclopenta-1,3-diyl Species by Electron Paramagnetic Resonance Spectroscopy
Platz, Matthew S.,Berson, Jerome A.
, p. 2358 - 2364 (2007/10/02)
The dissapearance of the triplet electron paramagnetic resonance (EPR) signal of 2-isopropylidenecyclopenta-1,3-diyl in a propanolic medium at 143.6 K is a second-order reaction.Its rate can be measured with an accuracy of about 50percent by EPR spectroscopy and is found to be approximately 0.13 times the diffusion-controlled encounter frequency.This is too fast to permit the mechanism to be a combination of the diyl singlet with the triplet and is consistent with a triplet-triplet dimerization.The rates of cycloaddition of the triplet diyl to olefins also can be measured by EPR techniques are best interpreted as the result of a stepwise triplet plus olefin reaction, in which the two new bonds of the cycloadduct are formed sequentially rather then simultaneously.
