DFT study of the reaction between TBD, 4-methyl benzylalcohol, and two molecule of 1-O-methyl-2,3-O-isopropylidene-4,6-O-carbonate-α-ᴅ-mannopyranose 1) ring-opening polymerization propagation step via a secondary alcohol chain data deposited in figshare repository DOI: 10.6084/m9.figshare.3469805 2) ring-opening polymerization propagation step via a primary alcohol chain data deposited in figshare repository DOI: 10.6084/m9.figshare.3470105