om700382a_si_003.cif (18.59 kB)

Formation of (C5Me5)2U(EPh)Me, (C5Me5)2U(EPh)2, and (C5Me5)2U(η2-TeC6H4) from (C5Me5)2UMe2 and PhEEPh (E = S, Se, Te)

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posted on 03.04.2020, 15:39 by William J. Evans, Kevin A. Miller, Joseph W. Ziller, Antonio G. DiPasquale, Katie J. Heroux, Arnold L. Rheingold
(C5Me5)2UMe2, 1, reacts with 1 and 2 equiv of PhEEPh (E = S, Se) to form (C5Me5)2UMe(EPh) (E = S, 2; Se, 3) and (C5Me5)2U(EPh)2 (E = S, 4; Se, 5), respectively, with concomitant formation of MeEPh. Complexes 2, 3, and 5 form at ambient temperature, but the synthesis of 4 required heating to 65 °C. Addition of 2 equiv of PhTeTePh to 1 equiv of (C5Me5)2UMe2 generated the tellurium analogue of 4 and 5, namely, (C5Me5)2U(TePh)2, 6, but when 1 was reacted with 1 equiv of PhTeTePh, C−H activation of the aryl ring occurred to form (C5Me5)2U(η2-TeC6H4), 7, along with MeTePh and CH4.