Dienophile cycloaddition to cycloheptatriene and related complexes of tricarbonyliron. X-Ray crystal structures of [Fe(CO)<sub>3</sub>(η<sup>4</sup>-C<sub>7</sub>H<sub>7</sub>CN)]·C<sub>2</sub>(CN)<sub>4</sub>and [ Fe(CO)<sub>3</sub>(η<sup>4</sup>-C<sub>7</sub>H<sub>7</sub>–C<sub>7</sub>H<sub>7</sub>)]
作者:Suman K. Chopra、Desmond Cunningham、Seamus Kavanagh、Patrick McArdle、Grainne Moran
DOI:10.1039/dt9870002927
日期:——
The rate of tetracyanoethene (tcne) addition to tricarbonyliron complexes of some substituted azepines and 1-cyanocycloheptatriene have been measured. Experimental support for a concerted mechanism for the cycloaddition of tcne to tricarbonyl(η4-cycloheptatriene) iron is provided by the high dienophile dependence of the observed reaction rate on chaning from tcne to tricyanoethene. Frontier orbital