Ionic liquid promotes N2 coordination to titanocene(III) monochloride

Coordination of N2 to [(Cp2TiCl)2] in a non-coordinating ionic liquid, Pyr4FAP, was studied by UV-vis/NIR and EPR spectroscopies. [(Cp2TiCl)2] is in equilibrium between monomeric [Cp2TiCl] and dimeric species [(Cp2TiCl)2]. The frozen solution EPR spectrum revealed the coordination of N2 to [Cp2TiCl], suggesting that Pyr4FAP promotes N2 coordination to the Ti(III) center.