67870-05-7Relevant articles and documents
A Molecular Rotor Possessing an H-M-H "spoke" on a P-M-P "axle": A Platinum(II) trans-Dihydride Spins Rapidly even at 75 K
Prack, Ernest,Okeefe, Christopher A.,Moore, Jeremy K.,Lai, Angel,Lough, Alan J.,Macdonald, Peter M.,Conradi, Mark S.,Schurko, Robert W.,Fekl, Ulrich
supporting information, p. 13464 - 13467 (2015/11/10)
A new class of low-barrier molecular rotors, metal trans-dihydrides, is suggested here. To test whether rapid rotation can be achieved, the known complex trans-H2Pt(PtBu3)2 was experimentally studied by 2H and 195Pt solid-state NMR spectroscopy (powder pattern changes with temperature) and computationally modeled as a tBu3P-Pt-PtBu3 stator with a spinning H-Pt-H rotator. Whereas the related chloro-hydride complex, trans-H(Cl)Pt(PtBu3)2, does not show rotational behavior at room temperature, the dihydride trans-H2Pt(PtBu3)2 rotates fast on the NMR time scale, even at low temperatures down to at least 75 K. The highest barrier to rotation is estimated to be ~3 kcal mol-1, for the roughly 3 ? long rotator in trans-H2Pt(PtBu3)2.