The reactions of arachno-decaboranyl complexes L2B10H12(L = two-electron donor ligand) with some platinum(II) compounds; nuclear magnetic resonance studies and the crystal and molecular structure of [8-Cl-7,7-(PMe2Ph)2-nido-7-PtB10H11]

Abstract

The reactions of arachno-6,9-(SMe₂)₂B₁₀H₁₂ and of arachno-6,9-(MeCN)₂B₁₀H₁₂ with the complex cis-[PtCl₂(PMe₂Ph)₂] give moderate yields of the nido-platinaundecaborane [8-Cl-7,7-(PMe₂Ph)₂-7-PtB₁₀H₁₁] which has been characterised by single-crystal X-ray diffraction analysis. Analogous reactions with the dimeric species [{PtCl₂(PR₃)}₂](R₃= Me_3–nPh_n, n= 0, 1, or 2), by contrast, give the nido-platinaundecaboranes [7-Cl-7-(PR₃)-8-(SMe₂)-7-PtB₁₀H₁₁] which have been characterized by single- and multiple-resonance n.m.r. spectroscopy. Additional products of the reactions include the arachno nine-vertex species 4-(MeCN)B₉H₁₃ and 4-(SMe₂)B₉H₁₃.