Dialkylcarbamato complexes of palladium(II). Crystal structure of trans-[Pd(O2CNEt2)2(NHEt2)2]

Abstract

The reaction of [Pd(MeCN)₄][BF₄]₂ with NHR₂(R = Et or Prⁱ) and carbon dioxide in toluene led to the dialkylcarbamato complexes [Pd(O₂CNR₂)₂(NHR₂)₂]. The derivative trans-[Pd(O₂CNEt₂)₂(NHEt₂)₂] was studied by X-ray diffraction methods. The square-planar geometry of the palladium atom involves one oxygen atom of each monodentate carbamato group and two amine nitrogen atoms. An intramolecular N–H ⋯ O bond is probably responsible for a further stabilization within the molecule, for the features of the IR bands associated with the carbamato ligand and for the ¹H NMR non-equivalence observed within the amine alkyl group at room temperature.