Collect. Czech. Chem. Commun. 1999, 64, 947-958

Polyhedral Azaplatinaborane Chemistry. Reaction of Members of the hypho-Type Family R'H2NB8H11NHR with [PtCl2(PMe2Ph)2] and [PtCl2(PPh3)2]. Formation of Members of the Family of Open Seven-Boron Species [3,3-(PMe2Ph)2-3-PtB7H10-μ-5,6-(NHR)]

Udo Dörfler, Paul A. Salter, Xavier L. R. Fontaine, Norman N. Greenwood, John D. Kennedy* and Mark Thornton-Pett

The School of Chemistry, University of Leeds, Leeds LS2 9JT, England


[PtCl2(PMe2Ph)2] and [(R'NH2)NB8H11NHR] (where both R' and R = Et or i-Pr and where R' = i-Pr, R = t-Bu) with NaH and air-exposure gives the series [3,3-(PMe2Ph)2-3-PtB7H10-μ-5,6-(NHR)] (33-44%) of which the structures are closely related to those of the open eight-boron hypho-type starting compounds [(R'NH2)B8H11NHR] by interchange of {BH(NH2R')} and {Pt(PMe2Ph)} vertices, with structural similarities to the rare arachno nine-vertex "normal" B9H15 geometry. Related compounds from related reactions are [(PPh3)2PtB7H10NHEt] and [(PMe2Ph)2PtB7H10NMe2].

Keywords: Boranes; Metallaboranes; Azametallaboranes; Platinaheteroboranes; X-Ray diffraction; Boron clusters; NMR spectroscopy, 1H, 11B, 31P.