Scheme 2. Synthesis and Reactions of (C^C)Gold(III) Hydrides, Showing the Atom Numbering Scheme Used for NMR Assignments, and the Molecular Structure of the Insertion Product 12.

Selected bond distances [Å] and angles [°]: Au1–C1 2.079(7), Au1–C12 2.070(6), Au1–P1 2.353(2), Au1–C24 2.078(7), C1–Au1–C12 81.1(3), C1–Au1–P1 96.8(2), P1–Au1–C24 89.7(2), C24–Au1–C12 92.3(3), C1–Au1–C24 173.4(3), C12–Au1–P1 177.3(2), torsion C1–Au1–C24–C25 91(2), torsion C1–Au1–C24–C27–88(3).