Synthesis and Characterization of Borohydride Rare-Earth Complexes Supported by 2-PyridinemethanAmido Ligands and their Application towards Ring-Opening Polymerization of Cyclic Esters The synthesis of 2-pyridinemethanamido borohydride complexes of yttrium and neodymium was achieved through the in situ deprotonation of the protio-ligand 2-pyridinemethanamine C5H3R1N-C(CH3)R2-NH(2,6-iPr2C6H3), noted as PyAH (with PyAH1: R1 = R2 = H; PyAH2: R1 = CH3, R2 = H; PyAH3: R1 = C(CH3)=N-(2,6-iPr2C6H3),...