The synthesis and characterization is reported of Tri aluminate (III) complexes of general formula Na[AlCl3 X], derived from monoanionic Ligands CL3X (X = No3, CH3COO, N3). Sodium Trichloronitratoaluminate, SCNA, Sodium Trichloroacetatoaluminate, SCAA, Sodium Trichloroazidoaluminate, SCAZA produced tri ionic aluminate complexes. They easily synthesized in a nearly quantitative yield using by direct reaction of AlCl3 with relative ligands. These compounds were characterized by IR, UV/Visible and Mass techniques. Concerning the molecular structure of the compound, the AL(III) cation (2S2,2P66) with four sp3 hybrided orbitals can form stable hero complex with two kind coordinating atoms, 3Cl , X atoms can be coordinated to the (AL) ion. The AL and Cl ,X atoms and the title ligand are disordered. Suggestion structural distortions away from the idealized C3V geometry. The antibacterial activities of synthesized compounds were studied against the four Gram-positive bacteria: Streptococcus pyogenes, Streptococcus agalactiae, Staphylococcus aureus, Bacillus anthracis, also against the two Gram negative bacteria: Klebsiella pneumoniae and Pseudomonas aeruginosa.