First characterisation of zirconium enolate radical cations in solution and their mesolytic bond cleavage to zirconocene cations
作者:Michael Schmittel、Rolf Söllner
DOI:10.1039/a708495a
日期:——
Zirconocene enolate radical cations are generated and characterised in solution for the first time; the sterically congested radical cations undergo a mesolytic Zr–O bond cleavage process yielding zirconocene cations, the kinetics of which are determined.
In this study, several novel sterically congested silicon and titanium bisenolates of exceptional hydrolytic stability have been synthesized and characterized. The structure of the titanium bisenolate T2 could be determined by X-ray structure analysis. Preparative one-electron oxidation of the stericallyshielded metal bisenolates S1-S4 and T1-T2 led to formation of the benzofurans B1 and B2. As the
Zirconium enolate radical cations in solution—characterisation and kinetics of their mesolytic Zr–O bond cleavage †
作者:Michael Schmittel、Rolf Söllner
DOI:10.1039/a808400i
日期:——
zirconocene enolateradicalcations and one hydroquinone biszirconocene radicalcation have been generated and characterised in solution by standard and fast scan cyclic voltammetry. The electroanalytical results along with those from product analysis of preparative one-electron oxidations indicate that the sterically congested radicalcations undergo a mesolytic Zr–O bondcleavage process. The kinetics of
First Characterisation of Enol Carbonate and Enol Carbamate Radical Cations in Solution. Kinetics and Selectivity of the Mesolytic Cleavage of the O–CO Bond
作者:Michael Schmittel、Holger Trenkle
DOI:10.1246/cl.1997.299
日期:1997.4
For the first time enol carbonate and enol carbamate radicalcations are characterised in solution by CV and EPR; the sterically congested radicalcations undergo an unprecedented mesolytic cleavag...
One-electron oxidation of enol phosphates, enol phosphites and enol phosphinates. Evidence for an unprecedented P–O bond cleavage in phosphoenol radical cations in solution<sup>1</sup>
For the first time phosphoenol radical cations are generated in solution and monitored by cyclic voltammetry and EPR; the sterically congested radical cations undergo an unprecedented P-O bond cleavage, the kinetics of which are determined.