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Dalton Trans. 2011 Sep 21;40(35):8941-9. doi: 10.1039/c1dt10342c. Epub 2011 Apr 26.

PNP pincer osmium polyhydrides for catalytic dehydrogenation of primary alcohols.

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  • 1Wilfrid Laurier University, Department of Chemistry, 75 University Ave. W., Waterloo, ON N2L 3C5, Canada.


This paper reports the synthesis, structure, and properties of a series of PNP pincer complexes of osmium OsH(3)Cl[HN(C(2)H(4)P(i)Pr(2))(2)] (1), OsH(3)[N(C(2)H(4)P(i)Pr(2))(2)] (2), OsH(4)[HN(C(2)H(4)P(i)Pr(2))(2)] (3), and OsH(2)(PMe(3))[HN(C(2)H(4)P(i)Pr(2))(2)] (4). The tetrahydride 3 operates as an efficient catalyst at 0.1 mol% loading for the reactions of amination and dehydrogenative coupling of primary alcohols, producing secondary amines and symmetrical esters, respectively. The catalyst 3 is distinguished by outstanding stability, and it can be used in an aqueous environment at temperatures as high as 200 °C.

This journal is © The Royal Society of Chemistry 2011

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