Synthesis and Crystal Structure of a Dinuclear Palladium Complex Containing C,O-Bridging Ester−Enolato Moieties

Palladium ester enolates have been prepared and characterized using IR, NMR, and single-crystal X-ray diffraction techniques. The X-ray diffraction established a dimeric crystal structure for complex {[N ∧ N]PdCH 2 C(O)OCH 3 } 2 (N ∧ N = 1-[1-(5-methylpyrrole-2-yl)ethylidne]amino-2,6-diisopropylbenzene), 2, which contains C,O-bridging enolato groups. Upon reaction with donor molecules (acetonitrile, phosphines), the dimeric 2 cleaves to form monometallic C-bound enolate complexes, 3 ‘ and 4 .