The aggregation-induced emission (AIE) for the triimidazole (triimidazo[1,2-a:1',2'-c:1'',2''-e][1,3,5]triazine) ligand (L) has been explained by short interplanar distances indicative of strong π−π interactions in the ground state, associated with a large interchromophoric π-stacking area and formation of H-aggregates [1]. Since the low-lying HOMOs and high-lying LUMOs for d10 metals often prevent the metal-centered emission to occur, the design of materials with ligand-centered emission from a highly emissive ligand with the use of optically inactive metal ions Zn(II) and Cd(II) allows tuning the manner of ligands‘ stacking and influences on the brightness, lifetime, quantum yield, and stability of emitters [2]. Herein we analyze the stacking patterns in newly synthesized Zn and Cd adducts containing L ligand. The structural landscape [3] is enriched by four mononuclear coordination complexes with compositions [M(H2O)4(L)2](NO3)2(H2O)2 [M=Cd(II), Co(II)] (1, 2); [Zn(NO3)(L)(H2O)3](NO3) (3), and [Zn(H2O)6](BF4)2(L)2 (4). Complexes 1 and 2 are isomorphous with the recently reported Zn(II) compound [3], belonging to the triclinic P-1 space group with similar unit cell dimensions. In 1, 2 the dimeric ligand‘s H-aggregates reported for free L ligand are replaced by the L…(NO3-…water)…L heteromeric stacks. In the triclinic crystal 3 the complex cations [Zn(NO3)(L)(H2O)3]+ form centrosymmetric dimers with antiparallel L arrangement and further aggregation of dimers into slipped columns with alternating L…L interplanar separations of 3.359 and 3.264 Å. The salt-cocrystal 4 that crystallizes in the non-centrosymmetric trigonal R-3 space group, represents an inclusion compound and accommodates L…L centrosymmetric dimers with interplanar separation of 3.461 Å, surrounded by [Zn(H2O)6]2+ cations and [BF4]- anions. All crystal structures are reinforced by hydrogen bonds with participation of anions, ligands and water molecules, and preliminary studies show that, in spite of the different ligands‘ stacking patterns, 1, 3 and 4 display emission properties currently under investigation.