it is an object of the present invention to provide an organometallic complex that can emit phosphorescence . in the following general formula , x represents — o — or — n —. r 1 to r 9 each represent any of hydrogen , an alkyl group or a cycloalkyl group having 1 to 6 carbon atoms , an alkoxy group having 1 to 6 carbon atoms , an alkoxycarbonyl group having 1 to 6 carbon atoms , an acyl group having 1 to 6 carbon atoms , an acyloxy group having 1 to 6 carbon atoms , a halogen group , a haloalkyl group , and an aryl group having 6 to 12 carbon atoms . in addition , r 10 represents any of an alkyl group or a cycloalkyl group having 1 to 6 carbon atoms , an acyl group having 1 to 6 carbon atoms , an aryl group having 6 to 12 carbon atoms , and a heteroaryl group having 4 to 10 carbon atoms . moreover , m represents an element belonging to group 9 or 10 .