Fig. 3: Calculated free energy diagram, showing the HT and TT pathways leading to lactone products 1a and 1b, respectively.
From: Gram-scale selective telomerization of isoprene and CO2 toward 100% renewable materials

Structures of the head-tail (HT) pathway are shown. Hydrogens and the aryl groups of the phosphine ligand are omitted for clarity. For the other pathways see SI.