21245-51-2Relevant articles and documents
GEOMETRICAL ISOMERS OF A BRIDGEHEAD IMINE: (E)- AND (Z)-2-AZABICYCLOOCT-1-ENE AND 2-AZABICYCLOOCT-1-ENE
Radziszewski, Juliusz G.,Downing, John W.,Wentrup, Curt,Kaszynski, Piotr,Jawdosiuk, Mikolaj,et al.
, p. 2799 - 2801 (1985)
-
Non-metallocene compounds, method for the production thereof and use of the same for the polymerisation of olefins
-
, (2008/06/13)
The invention relates to a method for producing special transition metal compounds, to novel transition metal compounds and to the use of the same for the polymerisation of olefins.
Decomposition and Isomerization of Bridgehead Cis 1,2-Diazenes (Azoalkanes)
Chae, Woo-Ki,Baughman, Sharon A.,Engel, Paul S.,Bruch, Manfred,Oezmeral, Cenan,et al.
, p. 4824 - 4833 (2007/10/02)
Four acyclic cis 1,2-diazenes, azo-1-adamantane (cis-ada), azo-bicyclooctane (cis-), azo-1-bicycloheptane (cis-), and azo-1-bicyclohexane (cis-) have been generated by UV irradiation of the corresponding trans-isomers.These compounds differ greately in stability, cis- easily surviving at 100 deg C and cis-ada not being isolable.Whereas cis- and cis-only isomerize back to trans on heating, the other two compounds undergo competing loss of nitrogen.The observation that the energy of the transition state for isomerization remains at 42 +/- 1 kcal mol-1 regardless of the cis ground state energy is used to argue that thermal isomerization proceeds via semilinearization rather than rotation.A remarkable correlation of cis ground state energy with cis n,?* excitation energy has emerged from this study.