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Tetrylenes are Able to Discern between Isomeric Structures of Unsaturated Osmium(IV) Polyhydrides
Javier A Cabeza1, Miguel A Esteruelas2, Susana Izquierdo2
1Departamento de Química Orgánica e Inorgánica, Centro de Innovación en Química Avanzada (ORFEO-CINQA), Universidad de Oviedo, 33071, Oviedo, Spain.
Abstract:
Hexahydride OsH6(PiPr3)2 (1) releases H2 to form the isomeric tetrahydrides 2 a and 2 b of general formula OsH4(PiPr3)2. Tetrylenes E{N(SiMe3)2}2 (E=Ge, Sn) are able to selectively trap these isomers distinguishing between them. Tetrylene Ge{N(SiMe3)2}2 catches 2 b to generate OsH4{Ge[N(SiMe3)2]2}(PiPr3)2 (3), which has a piano stool geometry, while Sn{N(SiMe3)2}2 captures 2 a to give OsH4{Sn[N(SiMe3)2]2}(PiPr3)2 (4) with the donor atoms defining a pentagonal bipyramid around the osmium center.
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