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