Synthetic, structural and biological properties of binuclear complexes with some Schiff bases.
The complexes of Co(II), Ni(II) and Cu(II) with N,N'-bis-[5-X-salicylidene]-4,4'-diaminodibenzyl, abbreviated as H2-XSalPDADB (X = -H, -CH3, -Br) have been synthesized and investigated by elemental analysis, electrical conductance, magnetic, spectral and thermal studies. The molar conductivity data indicate that the complexes are non-electrolytes. Analytical data support 1:1 (M:L) stoichiometry. The reflectance spectra along with the magnetic data suggest pseudo-tetrahedral geometry for the complexes. The Schiff bases function as tetradentate ligands coordinating through ON-NO donor system. Substitution in the phenyl ring of the complexes produces shift in the azomethine v(C=N) stretching vibrational frequency, which is related to the Hammett's substituent perameter (sigma). The 1H-NMR data reveal that all Schiff bases exist in enol-iminic form. Various ESR parameters for copper complexes have been calculated. The compounds have been screened for their biological activities.
Department of Chemistry, Institute of Science, 15, Madam Cama Road, Mumbai-400 032, India. rmpatil_2006@yahoo.com
Raju M
RM
Patil
D000900:Anti-Bacterial Agents / Q000138:chemical synthesis / Q000737:chemistry* / Q000494:pharmacology; D001419:Bacteria / Q000187:drug effects; D003035:Cobalt / Q000737:chemistry; D003300:Copper / Q000737:chemistry; D004553:Electric Conductivity; D004578:Electron Spin Resonance Spectroscopy; D008024:Ligands; D009682:Magnetic Resonance Spectroscopy; D009532:Nickel / Q000737:chemistry; D009942:Organometallic Compounds / Q000737:chemistry* / Q000494:pharmacology; D012545:Schiff Bases / Q000138:chemical synthesis / Q000737:chemistry* / Q000494:pharmacology; D013055:Spectrophotometry, Infrared
D000900:Anti-Bacterial Agents; D008024:Ligands; D009942:Organometallic Compounds; D012545:Schiff Bases; D003035:Cobalt; D003300:Copper; D009532:Nickel