Synthesis, X-ray crystal structure, and n.m.r. studies of trans-bis(dimethylpheylphosphine)bis[{dicarbido(4–)σ-Pt,σ-W1, η2-W2}-pentakis(t-butoxy)ditingsten(MM)]platinum(II)

Abstract

In hydrocarbon solutions trans-Pt(CCH)₂(PMe²Ph)₂, (1), and W₂(OBu^t)₆, (2), react to give, by successive eliminations of Bu^tOH, trans-Pt(CCH)[C₂W₂(OBu^t)₅](PMe₂Ph)₂, (3), and trans-Pt[C₂W₂(OBu^t)₅]₂(PMe₂Ph)₂, (4); compounds (3) and (4) are shown to contain dicarbido(4–) ligands on the basis of ¹³C n.m.r. studies and single crystal X-ray crystallography.