organometallic compounds and organic electroluminescence devices employing the same are provided . the organometallic compound has a chemical structure as represented by wherein r 1 , r 2 are hydrogen , phenyl , biphenyl , diisopropyl amino , or derivatives thereof . the organic electroluminescence device includes a pair of electrodes and an electroluminescent element disposed between the pair of electrodes , wherein the electroluminescent element includes the organometallic compound .