Syntheses and Crystal Structures of a Pair of Trinuclear Cobalt(II) Complexes with the Cations [Co_3L_4(APYH)_2] and [Co_3L_4(APY)_2] (APY = 2-aminopyridine, L = N-salicylaldehyde-2-iminopyridine)

摘要

Two cobalt(II) complexes, [Co_3L_4(APYH)_2](SO_4)_2 (1) and [Co_3. L_4(APY)_2](C1O_4)_2 (2), where APY is 2-aminopyrid!ne and L is N-salicylaldehyde-2-iminopyridine anion, were prepared and characterized by single crystal structure determination. The crys-tallographic study shows that each of the two complexes consists of a discrete trinuclear cobalt(II) dication, two sulfate anions in (1) or two perchlorate anions in (2). The similar cations in the two complexes are composed of three cobalt(II) atoms, four tridentate Schiff base ligands (L), and two protonated 2-aniinopyridines for (1) or two 2-aminopyridine molecules for (2).