TpPtMe(H)2: Why is there H/D scrambling of the methyl group but not methane loss?

The reactivity of TpPtMe(H)2 (Tp = hydrido-tris(pyrazolyl)borate) is investigated. This complex is remarkably resistant to methane loss, and heating it in methanol at 55 degree Celsius does not lead to either methane or hydrogen loss. Investigations of similar sized systems should be examined at the density functional theory or the mPW1k/SDB-cc-pVDZ/mPW1k/SDD level for improved accuracy of the energetic calculations.