Metallic compound and organic electroluminescence device comprising the same

1. A compound represented by the following Chemical Formula 1:

Wherein, M is selected from Ir, Pt, Rh, Re, or Os, 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 substituent, 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

R 1 -R 4 are the same or different, and are hydrogen, a C1 to C20 alkyl excluding an aromatic cyclic substituent, a cycloalkyl, a halogen, and

L 1 is represented by the following formula 3:

Wherein, L 1 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, or phosphorus, and

Z 1 and Z 2 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: