SYNTHESIS AND CHARACTERIZATION OF COMPLEXES OF CO(II), NI(II), CU(II)AND ZN(II) WITH MANNICH BASE LIGANDS DERIVED FROM PIPERAZINE AND ITS BIOLOGICAL ACTIVITY
Maǧallaẗ ǧāmiʻaẗ al-anbār li-l-ʻulūm al-ṣirfaẗ/Maǧallaẗ ǧāmiʻaẗ al-Anbār li-l-ʻulūm al-ṣirfaẗ