Metallic compound and organic electroluminescence device comprising the same

A metallic compound represented by the following Chemical Formula 1:

• wherein M is a transition metal selected from Ir, Pt, Rh, Re and Os, m is 2, provided that the m is 1 when M is Pt,
• R1, R2, R3, R4, R5, R6, R7, and R8 are the same or different, and are selected from substituents of hydrogen, a C1 to C20 alkyl, an aryl, a cycloalkyl, a halogen, a linear or branched substituent including at least one halogen, a linear or branched substituent including at least one heteroatom, carbonyl, vinyl, and acetylenyl, or have a cyclic structure formed from substituents,
• R9 is 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, and
• L1 is represented by the following Chemical Formula 2:
• wherein L1 in the above formula 2, 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, and
• X is a hetero atom selected from nitrogen, oxygen, sulfur and phosporus, and
• Z1 and Z2 are atoms for forming a C4 to C7 aromatic hydrocarbon ring or aromatic heterocyclic ring and are represented by the following Chemical Formulae 4: