Organometallic Complex and Light-Emitting Element, Light-Emitting Device, and Electronic Device Using the Same

An organometallic complex comprising a structure represented by a general formula (G2):

• wherein R1 represents any one of an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, and an alkoxycarbonyl group having 1 to 5 carbon atoms;
• R2 represents any one of hydrogen and an alkyl group having 1 to 4 carbon atoms;
• Ar represents an arylene group having 6 to 25 carbon atoms;
• M is a center metal selected from Group 9 element and Group 10 element;
• and α represents a position of carbon which bonds the center metal in the arylene group.

An organometallic complex comprising a structure represented by a general formula (G3):

• wherein R1 represents any one of an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, and an alkoxycarbonyl group having 1 to 5 carbon atoms;
• R2 and R3 each represent any one of hydrogen and an alkyl group having 1 to 4 carbon atoms;
• R4 to R6 each represent any one of hydrogen, an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, a halogen group, a trifluoromethyl group, an aryl group having 6 to 12 carbon atoms, a dialkylamino group having 2 to 8 carbon atoms, and a diarylamino group having 12 to 24 carbon atoms;
• and M is a center metal selected from Group 9 element and Group 10 element.

An organometallic complex comprising a structure represented by a general formula (G4):

• wherein R1 represents any one of an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, and an alkoxycarbonyl group having 1 to 5 carbon atoms;
• R2 represents any one of hydrogen and an alkyl group having 1 to 4 carbon atoms;
• R4 to R6 each represent any one of hydrogen, an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, a halogen group, a trifluoromethyl group, an aryl group having 6 to 12 carbon atoms, a diallylamino group having 2 to 8 carbon atoms, and a diarylamino group having 12 to 24 carbon atoms;
• and M is a center metal selected from Group 9 element and Group 10 element.

An organometallic complex comprising a structure represented by a general formula (G5):

• wherein R1 represents any one of an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, and an alkoxycarbonyl group having 1 to 5 carbon atoms;
• R2 represents any one of hydrogen and an alkyl group having 1 to 4 carbon atoms;
• R5 represents any one of hydrogen, an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, a halogen group, a trifluoromethyl group, an aryl group having 6 to 12 carbon atoms, a dialkylamino group having 2 to 8 carbon atoms, and a diarylamino group having 12 to 24 carbon atoms;
• and M is a center metal selected from Group 9 element and Group 10 element.