Patent ID: 7026062

Claim:
A metal coordination compound, which can be used in a luminescent device, represented by the following formula (2): wherein M denotes Ir, Rh or Pd; n is 2 or 3; Y denotes an alkylene group having 2–4 carbon atoms in which said alkylene group one or at least two non-neighboring methylene groups can be replaced with —O—, —S— or —C(O)— and capable of including a hydrogen atom which can be replaced with a linear or branched alkyl group having 1–10 carbon atoms; and X 1 and X 2 independently denote a hydrogen atom; halogen atom; a nitro group; a trialkylsilyl group having 1–8 carbon atoms; or a linear or branched alkyl group having 1–20 carbon atoms in which said alkyl group one or at least two non-neighboring methylene groups can be replaced with —O—, —S—, —C(O)—, —C(O)—O—, —O—C(O)—, —CH═CH— or —C≡C— and capable of including a hydrogen atom which can be replaced with a fluorine atom.