Ligand-Driven Anion−π Interaction-Induced Silver(I) Coordination Chemistry

Three novel coordination compounds were successfully isolated using rare and poorly studied 5-phenyl-2,2′-bipyridine ( L I ) and completely unexplored 6-phenyl-3-(pyridin-2-yl)-1,2,4-triazine ( L II ) ligands with AgNO 3, namely, [Ag(L I ) 2 ]NO 3 ·0.5H 2 O ( 1 ), [Ag(L I )PPh 3 NO 3 ]·0.5CH 2 Cl 2 ( 2 ), and [Ag 2 (L II ) 2 (H 2 O) 2 ](NO 3 ) 2 ( 3 ). 1 can be converted into 2 upon reacting with PPh 3, while no conversion was observed for 3 . The formation of 3 was templated through anion−π-system interactions between the NO 3 – anions and the electron deficient 1,2,4-triazine ring of L II, which play a crucial role in the supramolecular assembly.