New oligo-α-pyridylamino ligands and their metal complexes

Abstract
Three novel oligo-α-pyridylamino ligands, tripyridyldi-amine (H2tpda), tetrapyridyltriamine (H3teptra), pentapyridyltetramine (H4peptea) are synthesized; the crystal structures of their metal complexes with the all-anti configuration of the chelating ligands are reported.