N-Heterocyclic carbenes(NHCs)have played significant roles as a versatile class of ligands in organic catalysis,delivering excellent catalytic properties in aspects such as air and thermal stability and functional group tolerance.1-2 When the N-substituents on the NHC skeleton contain donor atoms(N,O,S,or P,et al.)possessing coordination function,the NHC can act as a polydentate ligand and coordinate with various transition metals.3 The resulting chelating type NHC metal complexes exhibit preeminent catalytic performance in many kinds of reactions of carbon-carbon or carbon-hetero atom bonds construction.Recently,our group have been engaged in the synthesis of pyridine and pyrimidine functionalized chiral NHC metal complexes.Using inexpensive amino acid as starting materials,a series of chelating bidentate NHC-Pd complexes were synthesized and fully characterized(Fig.1).Single crystals of 6a suitable for X-ray diffraction analysis were obtained by slow evaporation of the corresponding CH2Cl2/Hexane(1:1 v/v)solution.The molecular structure was shown in Fig.1.