| C6 | C8 | C10 | Ref. |
|---|---|---|---|
| 4.1065[3] | 4.7599[5] | 6.3524[7] | M. Marinescu, Phys. Rev. A submitted |
| 4.149[3] | 4.531[5] | 5.724[7] | S. H. Patil and K. T. Tang, J. Chem. Phys. 106, 2298 (1996) |
| 5.200[3] | 4.907[5] | n/a | B. Bussery, Y. Achker, and M. Aubert-Frecon, Chem. Phys. 116, 319 (1987) |
| 4.33(0.04)[3] | 4.565(0.105)[5] | 5.65(0.22)[7] | J. M. Standard and P. R. Certain, J. Chem. Phys. 83, 3002 (1985) |
| 4.35(0.04)[3] | 5.223(0.399)[5] | 6.638(0.770)[7] | K. T. Tang, J. M. Norbeck, and P. R. Certain, J. Chem. Phys. 64, 3063 (1976) |
| 4.28(0.05)[3] | n/a | n/a | P. W. Langhoff and M. Karplus, J. Chem. Phys. 53, 233 (1970) |
| 4.000[3] | n/a | n/a | A. Dalgarno and W. D. Davison, Mol. Phys. 13, 479 (1967) |