Centauric model

These results suggest a competitive interaction between the active and nodal substituents. The geometries of these transition states support this competition their values are quite similar to the distance found in the parent 1,5-hexadiene. Computational examinations of the substituent effects on the Cope rearrangement conclude that the centauric model does not apply. The chameleonic model makes a better accounting of the cooperative and competitive ways the substituents affect the Cope rearrangement. Borden has proposed a simple mathematical model that allows for the prediction of the stabilization of the transition state by substituents solely on the change in... 

Polo V, Andres J (2005) A joint study based on the electron localization function and catastrophe theory of the chameleonic and centauric models for the cope rearrangement of 1,5-hexadiene and its cyano derivatives. J Comput Chem 26 1427-1437... 

Hi pressure adsorption isotherm measurements of Nj, Ar, CH4, and O2 (at three different temperatures) were carried out with a volumetric device described earlier by Belmabkhout et al [17]. These experimental data have also been published [18]. By minimizing the discrepancies between the experimental and calculated results, it was possible to detomine the adjustable unknown parameters of the model. Fig. 1 shows an sample of die experimental and theoretical isotherms on Centaur (AC). 

---