Synthesis and Structure of a Trinuclear Pd–Ag–Pd Carbene Acetato Complex

Abstract

AbstractWe describe the synthesis and the solid‐state structure of a trinuclear Pd–Ag–Pd carbene acetato complex. The structure was determined by single‐crystal X‐ray experiments [P21/n (no. 14) a = 12.0241(4), b = 25.7201(10), c = 21.3564(8) Å, β = 93.841(2)°, V = 6589.9(4) Å3, Z = 4, R1 = 0.0319, wR2 = 0.0721]. The complex consists of two palladium biscarbene units connected to a silver atom by bridging acetate ions with Pd–Ag bond lengths of 2.89 Å, which are shorter than the sum of the van der Waals radii. Additionally the 13C NMR shifts of the carbene carbon atoms indicate that a palladium silver interaction is present. The repeat unit in the unit cell contains one complex and an infinite chain of two water molecules, one acetic acid and one acetate ion. We show that the hydrogen bond between the complex and a water molecule is the reason for the distorted arrangement.