Polydendate ligands (6-R1-2-pyridylmethyl)-R2 (R1= NHCOtBu, R2= bis-(2-pyridylmethyl) amine L1; R1= NH2, R2= bis-(2-pyridylmethyl) amine L2; R1= NHCOtBu, R2= N (CH2CH2) 2NMe L3; R1= NH2, R2= N (CH2CH2) 2NMe L4; R1= NHCOtBu, R2= N (CH2CH2) 2O L5; R1= NH2, R2= N (CH2CH2) 2O L6) were prepared as part of an effort to rationally design ligands that induce internal hydrogen bonding to other metal-bound ligands to be used as ...