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. 2022 Jun 8;24(26):16360–16373. doi: 10.1039/d1cp05861d

Nuclear-spin-statistical weights of the rovibronic wavefunctions of CH4 and CD4 in the Td (M) group.

CH4 CD4 Degeneracy Total nuclear spin I(CH4; CD4)
A1(5) A1(15) 1 {2; 4
A2(5) A2(15) 1
E(2) E(12) 2 0
F1(3) F1(18) 3 {1; 2
F2(3) F2(18) 3