An organometallic complex which can emit phosphorescence is provided. The organometallic complex, which is a novel substance, is represented by General Formula (G1) or General Formula (G2). In General Formula (G1), R
1
to R
10
each represent an alkyl group having 1 to 4 carbon atoms. M represents a Group 9 element or a Group 10 element. When M is a Group 9 element, n is 3, and when M is a Group 10 element, n is 2. In General Formula (G2), R
11
to R
20
each represent an alkyl group having 1 to 4 carbon atoms. M represents a Group 9 element or a Group 10 element. When M is a Group 9 element, n is 3, and when M is a Group 10 element, n is 2.
The organometallic complex, which is a novel substance, is represented by General Formula (G1) or General Formula (G2). In General Formula (G1), R1 represents an alkyl group having 1 to 4 carbon atoms and R2 to R10 each represents hydrogen or an alkyl group having 1 to 4 carbon atoms. M represents a Group 9 element or a Group 10 element. When M is a Group 9 element, n is 3, and when M is a Group 10 element, N is 2. In General Formula (G2), R11 represents an alkyl group having 1 to 4 carbon atoms and R12 to R20 each represents hydrogen or an alkyl group having 1 to 4 carbon atoms. M represents a Group 9 element or a Group 10 element. When M is a Group 9 element, n is 3, and when M is a Group 10 element, N is 2.