Rashd. M. El-FerjaniMusa AhmadFarah Wahida HarunBulgasem Y Bulgasem2024-05-282024-05-2820171/9/20202278-57361450-3010.9790/5736-1006010613chrome-extension://efaidnbmnnnibpcajpcglclefindmkaj/viewer.html?pdfurl=https%3A%2F%2Fwww.iosrjournals.org%2Fiosr-jac%2Fpapers%2Fvol10-issue6%2FVersion-1%2FB1006010613.pdf&clen=738371&chunk=truehttps://oarep.usim.edu.my/handle/123456789/4250IOSR Journal of Applied Chemistry (IOSR-JAC) e-ISSN: 2278-5736.Volume 10, Issue 6 Ver. I (June. 2017), PP 06-13 www.iosrjournals.orgA new chain of Schiff base complexes made up of Cu (II), Co (II), Cd (II),Ni (II), and Mn (II) ions derivatives were obtained by the condensation of 4-dimethyl-aminobenzaldehyde, and 4-aminoantipyrin and some amino acids. The structures of all synthesized complexes were established on the basis of their elemental analysis (UV, FTIR, and 1HNMR). The study of X-ray crystallographic shows that the compound (Z)-4-((4-(dimethylamino)benzylidene)amino)-1,5-dimethyl-2-phenyl-1,2-dihydro-3H-pyrazol-3-one (L5) crystallized in monoclinic system with space group of C2/c and the unit cell dimensions are a= 17.7916, b= 6.8610, c= 29.7199, α =90.000 β =101.326 γ = 90.000., Z = 8 and V = 3557.20 Å3.The antibacterial activity of the complexes are tested against Bacillus subtilis, Bacillus cereus and Pseudomonas aeruginosa. Keywords: Schiff base, 4-dimethyl-aminobenzaldehyde, 4-aminoantipyrin, Schiff base complexes, Bacillus cereus, Pseudomonas aeruginosa and Bacillus subtilis.enSchiff base,4-dimethyl-aminobenzaldehyde,4-aminoantipyrin,Schiff base complexes,Bacillus cereus,Pseudomonas aeruginosaBacillus subtilis.Article613106