Metallic compound and organic electroluminescence device comprising the same

1. 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,

R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 , and R 8 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,

R 9 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

L 1 is represented by the following Chemical Formula 2:

wherein L 1 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

Z 1 and Z 2 are atoms for forming a C4 to C7 aromatic hydrocarbon ring or aromatic heterocyclic ring and are represented by the following Chemical Formulae 4:

2. An organic electroluminescence device comprising the metallic compound of claim 1 .