A series of macrocyclic heterobimetallic complexes of type [Mc(tntnam)Mo](PF6)n and [Mc'(tntnim)Ni](PF6)n where Mc = Co(III) and Zn(II), Mc' = Co(II), Co(III), and Zn(II), and Mo = Ni(II), Cu(II), and Zn(II) have been synthesized and characterized. The macrocyclic ligands tntnim 2 and tntnam 3 contain two geometrically distinct compartments, 6-coordinate (closed site) and 4-coordinate (open site), which are bridged by phenolic oxygens. The heterobimetallic complexes with Zn(II) or Ni(II) in the open site are primarily formed as 5-coordinate with a chloride ion as a fifth ligand; the latter can be removed by Ag+ ion. The crystal structures of [Zn(tntnim)NiCl]PF6·C2H5OH, 5, [Zn(tntnam)Ni](PF6)2, 11, [Zn(tntnam)Cu](PF6)2, 12, and [Co(tntnam)Ni(H2O)](PF6)3·4H2O, 14 were determined. Crystal data for 5: monoclinic, T = 123 K, a = 15.822(2), b = 15.6230(10), c = 16.432(2) Å, β = 104.570(10)°, Z = 4, space group Pc, R = 0.0371 (wR2 = 0.0843) for 5826 reflections with I [Formula: see text] 2σ(I). Crystal data for 11: tetragonal, T = 123 K, a = b = 24.122(2), c = 14.397(7) Å, Z = 8, space group P41212, R = 0.0625 (wR2 = 0.1549) for 3250 reflections with I [Formula: see text] 2σ(I). Crystal data for 12: tetragonal, T = 123 K, a = b = 24.180(2), c = 14.281(4) Å, Z = 8, space group P41212, R = 0.0588 (wR2 = 0.1219) for 3452 reflections with I [Formula: see text] 2σ(I). Crystal data for 14: triclinic, T = 287 K, a = 12.664(2), b = 12.983(2), c = 16.216(3) Å, α = 80.317(14)°, β = 69.585(12)°, γ = 74.791(12)°, Z = 2, space group P[Formula: see text], R = 0.0573 (wR2 = 0.1332) for 3443 reflections with I [Formula: see text] 2σ(I). The structures were solved by direct methods and refined by full-matrix least-squares procedures. The crystal structures demonstrate that the expected trans pyridine structures are formed. The magnetic moments, electrospray mass spectra, electronic absorption and emission spectra, and redox couples are reported. Key words: cobalt, copper, nickel, zinc, heterobimetallic, macrocycle.