Metallic Compound and Organic Electroluminescence Device Comprising the Same

A metallic compound represented by the following Chemical Formula 1:

• Wherein, M is selected from Ir, Pt, Rh, Re, Os, or the like, m is 2, provided that m is 1 when M is Pt,
• of the Chemical Formula 1 is represented by the following Chemical Formulae 2:
• Wherein, a portion denoted as * in the above Chemical Formulae 2 has a carboxyl substitutent, and transition metal M forms a complex compound by a covalent bond with the carboxyl group and a coordination bond with an adjacent N or P atom, and
• R1-R12 are the same or different, and are hydrogen, a C1 to C20 alkyl excluding an aromatic cyclic substituent, a cycloalkyl, a halogen, a linear or branched substituent including at least one halogen, or a linear or branched substituent including at least one heteroatom, or form a cycle, and
• L1 is represented by the following formula 3:
• Wherein, L1 in the above formula 3, is a independent ligand having a covalent bond site with a carbon denoted as * and a coordination bond with nitrogen and forming a complex compound with the transition metal M of the Formula 1,
• X is a hetero atom of nitrogen, oxygen, sulfur, phosphorus, and so on, and
• Z1 and Z2 are atoms for forming a C4 to C7 aromatic hydrocarbon ring or aromatic heterocyclic ring and represented by any one of the following Chemical Formulae 5: