A zirconium polyhydride dimer, [Zr2H4(BH4)4(PMe3)4]

The dimer tetra-μ-hydrido-bis[bis(tetrahydroborato)bis(trimethylphosphine)zirconium(IV)], [Zr(BH 4 ) 2 H 2 (C 3 H 9 P) 2 ] 2 consists of two Zr atoms linked by four bridging hydride ligands. Each Zr atom is ligated by two PMe 3 ligands and two bidentate BH 4 - groups. The single crystallographically independent Zr atom lies on a twofold axis and the molecule has exact 4 point symmetry