No abstract

No abstract

No abstract

Mobility of configuration and conformation in the “push−pull” cross-conjugated derivative 1,3-diphenyl-2-(p-dimethylaminophenyl)iminopropane-1,3-dione has been investigated by NMR. The energetics of the thermal process that interconnects the syn- and anti-configurations of the imino group with the atropisomeric conformations of the skewed benzoyl groups are defined. It is proposed that a symmetric Y-delocalized transition state thermally interconnects the inversion of the imino configurations with the mobile interchange of the skewed benzoyl conformations. This connection is observable through a unique NMR window.

No abstract