Triple Bond to Lead: Synthesis and Characterization of the Plumbylidyne Complex <i>trans</i>‐[Br(PMe₃)₄MoPbC₆H₃‐2,6‐Trip₂]

Abstract

Mine's a triple! The reaction of cis-[Mo(N2)2(PMe3)4] with (Pb(Br)R)2 affords the red-brown plumbylidyne complex 1 (see scheme), which is the first compound to feature a triple bond to a main-group element of the sixth row. The molecular structure of 1 reveals a very short MoPb bond of 2.5495(8) Å and a near linear coordination at the lead atom (Mo-Pb-Caryl 177.8(2)°) (R=2,6-Trip2-C6H3, Trip=2,4,6-iPr3-C6H2).