[(C 5 Me 5 ) 2 U(Me)(OTf)] 2 : A New Reagent for Uranium Metallocene Chemistry. Preparation of the First Actinide Hydrazonato Complexes

The synthesis and characterization of the first actinide hydrazonato complex, (C 5 Me 5 ) 2 U(η 2 ( N, N ‘)-CH 3 NN CPh 2 )(OTf) ( 3 ), has been made possible by use of the organouranium(IV) trifluoromethanesulfonate (triflate) complex [(C 5 Me 5 ) 2 U(CH 3 )(OTf)] 2 ( 2; OTf = OSO 2 CF 3 ), which is derived from the reaction between (C 5 Me 5 ) 2 U(CH 3 ) 2 and Ph 3 COTf. The related chemistry for (C 5 Me 5 ) 2 U(CH 3 )(Cl) is also reported. All new complexes have been structurally characterized.