Metallic compound and organic electroluminescence device comprising the same

1. A binuclear transition metal compound of the following Chemical Formula 1:

wherein M is a transition metal selected from the group consisting of Ir, Pt, Rh, Re, and Os, m is 2, provided that the m is 1 when M is Pt,

A 1 and B 1 in the above Formula 1 are of the following Formula 3:

wherein, in the above Formula 3, A 1 is bound with a portion denoted as * and adjacent B 1 by a covalent bond, and the transition metal, M forms a complex compound by a covalent with a portion denoted as “a” of A 1 and by a coordination bond with a N atom of B 1 ,

Z is a Si, or C atom,

R 1 -R 32 , R 34 , R 35 , R 36 , R 38 , R 39 , and R 40 are the same or different, and are substituents selected from the group consisting of hydrogen, a C1 to C20 alkyl, an aryl, a cycloalkyl, a halogen, a trifluoromethyl, carbonyl, vinyl, and acetylenyl,

R 33 and R 37 are hydrogen, a C1 to C20 alkyl excluding an aromatic cyclic substituent, a cycloalkyl, or a halogen, and

L 1 is of the following Formula 5:

wherein the above Formula 5 is an 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 the group consisting of nitrogen, oxygen, sulfur, and phosphorus, and

Z 1 and Z 2 are atoms for forming a C4 to C7 aromatic hydrocarbon ring or aromatic heterocyclic ring, and

wherein L 1 of Chemical Formula 5 is one of the following Chemical Formulae 7:

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