Reactions of [Pt(Ph)2(SME2)2] with the bidentate ligand 1,10-phenanthroline (phen) give [Pt(Ph)2phen). There is kinetic pathway with activation parameters ?#H = +101 kj mol and ?+S= +42 JK mol ". Propose a mechanism. I understand the mechanism but don't get how the ?#H and ?#S come in to play, do they have anything to do with being dissociative?