Isolation of elusive HAsAsH in a crystalline diuranium(IV) complexTools Gardner, Benedict M., Balázs, Gábor, Scheer, Manfred, Wooles, Ashley J., Tuna, Floriana, McInnes, Eric J.L., McMaster, Jonathan, Lewis, William, Blake, Alexander J. and Liddle, Stephen T. (2015) Isolation of elusive HAsAsH in a crystalline diuranium(IV) complex. Angewandte Chemie International Edition, 54 (50). pp. 15250-15254. ISSN 1433-7851 Full text not available from this repository.
Official URL: https://doi.org/10.1002/anie.201508600
AbstractThe HAsAsH molecule has hitherto only been proposed tentatively as a short-lived species generated in electrochemical or microwave-plasma experiments. After two centuries of inconclusive or disproven claims of HAsAsH formation in the condensed phase, we report the isolation and structural authentication of HAsAsH in the diuranium(IV) complex [{U(TrenTIPS)}2(μ-η2:η2-As2H2)] (3, TrenTIPS=N(CH2CH2NSiPri3)3; Pri=CH(CH3)2). Complex 3 was prepared by deprotonation and oxidative homocoupling of an arsenide precursor. Characterization and computational data are consistent with back-bonding-type interactions from uranium to the HAsAsH π*-orbital. This experimentally confirms the theoretically predicted excellent π-acceptor character of HAsAsH, and is tantamount to full reduction to the diarsane-1,2-diide form.
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