Intrinsic reactivity of [OUCH] : Apparent synthesis of [OUS] by reaction with CS.

Rationale: Building on our report that collision-induced dissociation (CID) can be used to create the highly reactive U-alkylidyne species [O=U≡CH] , our goal was to determine whether the species could be as an intermediate for synthesis of [OUS] by reaction with carbon disulfide (CS ).

Methods: Cationic uranyl-propiolate precursor ions were generated by electrospray ionization, and multiple-stage CID in a linear trap instrument was used to prepare [O=U≡CH] . Neutral CS was admitted into the trap through a modified He inlet and precision leak valves.

Intrinsic chemistry of [OUCH]: reactions with HO, CHC[triple bond, length as m-dash]N and O.

We report the first experimental study of the intrinsic chemistry of a U-methylidyne species, focusing on reaction of [OUCH]+ with H2O, O2 and CH3C[triple bond, length as m-dash]N in the gas phase. DFT was also used to determine reaction pathways, and establish the mechanism by which [OUCH]+ is formed through collision-induced dissociation of [UO2(C[triple bond, length as m-dash]CH)]+.