In that case, we have seen DP=16 we got the polymer after 30 min and the % yield was 42 % gravimetrically. When vary the DP= 24, 32 and 40 the polymerization time was 30 min and % yield was 41 %, 57 % and 67 % respectively (Table ). All the homopolymerization were done in the presence of EbiB as initiator in the presence of Zn/PMDETA as the catalyst/Ligand system.