Moller-Plesset perturbation theory convergence

Electron correlation (how well does Moller-Plesset perturbation theory converge for these problems )... 

Table 6 displays some bonding energies for CI2-, as calculated at the D-BOVB level and at other theoretical levels, including Hartree-Fock and Moller-Plesset perturbation theory. Unlike the F2 case, the Moller-Plesset series converges well around the values of 24-25 kcal/mol which can be taken as references for the bonding energy in this basis set. 

The most recent of the publications to question the applicability of the low order theory studies is authored by Schaefer and his co-workers who ask the question Is Moller-Plesset perturbation theory a convergent ab initio method These authors write... 

Convergent smmnation of Moller-Plesset perturbation theory ... 

Is Moller-Plesset Perturbation Theory a Convergent Ah Initio Method ... 

Cremer, D. and He, Z. (1996) Sixth-order Moller-Plesset perturbation theory on the convergence of the MPn series. J. Phys. Chem., 100, 6173-6188. Grimme, S., Goerigk, L., and Fink, R.F. (2012) Spin-component-scaled electron correlation methods. Wiley Interdiscip. Rev. Comput. Mol Sci., 2, 886-906. Schwabe, X. and Grimme, S. (2008) Xheoretical thermodynamics for... 

---