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1. An organometallic compound represented by Formula 1: wherein, in Formula 1: M is a transition metal; X1 is N or C(R5); R1 to R5 are each independently selected from the group of a hydrogen atom, a deuterium atom, a halogen atom, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine, a hydrazone, a carboxyl group or a salt thereof, a sulfonic acid group or a salt thereof, a phosphoric acid group or a salt thereof, a substituted or unsubstituted C1-C60 alkyl group, a substituted or unsubstituted C2-C60 alkenyl group, a substituted or unsubstituted C2-C60 alkynyl group, a substituted or unsubstituted C1-C60 alkoxy group, a substituted or unsubstituted C3-C10 cycloalkyl group, a substituted or unsubstituted C3-C10 cycloalkenyl group, a substituted or unsubstituted C3-C10 heterocycloalkyl group, a substituted or unsubstituted C3-C10 heterocycloalkenyl group, a substituted or unsubstituted C6-C60 aryl group, a substituted or unsubstituted C6-C60 aryloxy group, a substituted or unsubstituted C6-C60 arylthio group, a substituted or unsubstituted C2-C60 heteroaryl group, —N(Q1)(Q2),—Si(Q3)(Q4)(Q5), —C(═O)(Q6), and a binding site with an adjacent ligand via a single bond or a divalent linking group;
two substituents of R1 to R5 are optionally linked together to form one selected from the group of a substituted or unsubstituted C4-C20 alicyclic ring, a substituted or unsubstituted C2-C20 hetero alicyclic ring, a substituted or unsubstituted C6-C20 aromatic ring, and a substituted or unsubstituted C2-C20 heteroaromatic ring; Q1 to Q6 are each independently selected from the group of a hydrogen atom, a substituted or unsubstituted C1-C60 alkyl group, a substituted or unsubstituted C6-C60 aryl group, and a substituted or unsubstituted C2-C60 heteroaryl group; n is an integer from 1 to 3; m is an integer from 0 to 4, wherein when m is 1, 2, 3, or 4, L is represented by at least one selected from the group of Formulae 2A to 2F: wherein, in Formulae 2A to 2F: M1 is P or As; X11a, X11b, X12, X13, X14, X15, X16a, X16b, X16c, X16d, X16e, X16f, X16g, X17a, X17b, X17c, and X17d are each independently selected from the group of C(R40)x, N, O, N(R35), P(R36)(R37), and As(R38)(R39); R33″ and R34″ are each independently selected from the group of a single bond, a substituted or unsubstituted C1-C5 alkylene group, and a substituted or unsubstituted C2-C5 alkenylene group; R31, R32a, R32b, R32c, R33a, R33b, R34, R35, R36, R37, R38, R39, and R40 are each independently selected from the group of a hydrogen atom, a deuterium atom, a halogen atom, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine, a hydrazone, a carboxyl group or a salt thereof, a sulfonic acid group or a salt thereof, a phosphoric acid group or a salt thereof, a substituted or unsubstituted C1-C60 alkyl group, a substituted or unsubstituted C2-C60 alkenyl group, a substituted or unsubstituted C2-C60 alkynyl group, a substituted or unsubstituted C1-C60 alkoxy group, a substituted or unsubstituted C3-C10 cycloalkyl group, a substituted or unsubstituted C3-C10 cycloalkenyl group, a substituted or unsubstituted C3-C10 heterocycloalkyl group, a substituted or unsubstituted C3-C10 heterocycloalkenyl group, a substituted or unsubstituted C6-C60 aryl group, and a substituted or unsubstituted C2-C60 heteroaryl group; the C ring, the D ring, the E ring, the F ring, the G ring, and the H ring are each independently selected from the group of a 5-membered to 20-membered saturated ring, and a 5-membered to 20-membered unsaturated ring; x is an integer from 0 to 2; and * is a binding site with M in Formula 1. |
