| C6 | C8 | C10 | Ref. |
|---|---|---|---|
| 2.5251[3] | 2.5450[5] | 3.0273[7] | M. Marinescu, Phys. Rev. A submitted |
| 2.582[3] | 2.444[5] | 2.773[7] | S. H. Patil and K. T. Tang, J. Chem. Phys. 106, 2298 (1996) |
| 3.085[3] | 2.602[5] | n/a | B. Bussery, Y. Achker, and M. Aubert-Frecon, Chem. Phys. 116, 319 (1987) |
| 3.285(0.685)[3] | 2.935(0.555)[5] | 3.22(0.59)[7] | J. M. Standard and P. R. Certain, J. Chem. Phys. 83, 3002 (1985) |
| 2.69(0.01)[3] | 2.707(0.208)[5] | 3.010(0.302)[7] | K. T. Tang, J. M. Norbeck, and P. R. Certain, J. Chem. Phys. 64, 3063 (1976) |
| 2.79(0.03)[3] | n/a | n/a | P. W. Langhoff and M. Karplus, J. Chem. Phys. 53, 233 (1970) |
| 2.600[3] | n/a | n/a | A. Dalgarno and W. D. Davison, Mol. Phys. 13, 479 (1967) |