Novel Dimerization of Maleic Anhydride at a Mo<sub>2</sub> Complex: Phase-Driven Keto/Enol Tautomerism in a Phosphinidenium–Ylide Complex
作者:Isabel G. Albuerne、M. Angeles Alvarez、M. Esther Garcı́a、Daniel Garcı́a-Vivó、Miguel A. Ruiz
DOI:10.1021/om4009586
日期:2013.11.11
A novel dimerization of maleic anhydride involving olefinic to carbonyl C-C coupling and an [1,7]-H shift is promoted by a strongly nucleophilic pyramidal phosphinidene complex. The resulting carbene is stabilized by coordination of the P atom of the phosphinidene ligand and undergoes keto/enol tautomerization when going from solution to the solid state. This is accompanied by a strong pyramidalization of the ylidic carbon atom, facilitated by the presence of pi center dot center dot center dot pi stacking interactions in the crystal lattice.