Formation of (C<sub>5</sub>Me<sub>5</sub>)<sub>2</sub>U(EPh)Me, (C<sub>5</sub>Me<sub>5</sub>)<sub>2</sub>U(EPh)<sub>2</sub>, and\n(C<sub>5</sub>Me<sub>5</sub>)<sub>2</sub>U(<i>η</i><sup>2</sup>-TeC<sub>6</sub>H<sub>4</sub>) from (C<sub>5</sub>Me<sub>5</sub>)<sub>2</sub>UMe<sub>2</sub> and PhEEPh\n(E = S, Se, Te)
William J. Evans (529233)Kevin A. Miller (2102332)Joseph W. Ziller (1340067)Antonio G. DiPasquale (1274730)Katie J. Heroux (1276398)Arnold L. Rheingold (1274736)
Abstract
(C<sub>5</sub>Me<sub>5</sub>)<sub>2</sub>UMe<sub>2</sub>, <b>1</b>, reacts with 1 and 2 equiv of PhEEPh (E = S, Se) to form (C<sub>5</sub>Me<sub>5</sub>)<sub>2</sub>UMe(EPh) (E\n= S, <b>2</b>; Se, <b>3</b>) and (C<sub>5</sub>Me<sub>5</sub>)<sub>2</sub>U(EPh)<sub>2</sub> (E = S, <b>4</b>; Se, <b>5</b>), respectively, with concomitant formation of\nMeEPh. Complexes <b>2</b>, <b>3</b>, and <b>5</b> form at ambient temperature, but the synthesis of <b>4</b> required heating to\n65 °C. Addition of 2 equiv of PhTeTePh to 1 equiv of (C<sub>5</sub>Me<sub>5</sub>)<sub>2</sub>UMe<sub>2</sub> generated the tellurium analogue\nof <b>4</b> and <b>5</b>, namely, (C<sub>5</sub>Me<sub>5</sub>)<sub>2</sub>U(TePh)<sub>2</sub>, <b>6</b>, but when <b>1</b> was reacted with 1 equiv of PhTeTePh, C−H\nactivation of the aryl ring occurred to form (C<sub>5</sub>Me<sub>5</sub>)<sub>2</sub>U(<i>η</i><sup>2</sup>-TeC<sub>6</sub>H<sub>4</sub>), <b>7</b>, along with MeTePh and CH<sub>4</sub>.
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