LAUSR

Abstract The capability of (2E,2′E)-2,2′-(pyridine-2,6-diylbis(ethan-1-yl-1-ylidene))bis(N-ethylhydrazine-carbothioamide), H2L to chelate the VO2+, Mn2+, Co2+, Ni2+, Zn2+, Pd2+, Pt2+ and Cu2+ (Cl− or ClO4−) ions individually and in admixture (Cu2+/Ag+) has been investigated. The ligand adopts orthorhombic crystal with a = 9.3757(6) A; b = 12.3280(7) A; c = 16.2948(9) A and space group of P n a 21. The molar conductivity values classify the complexes as conducting [Co2+, Ni2+, Mn2+, Cu(ClO4)2 and Cu2+/Ag+] and nonconducting. The IR and NMR spectra of H2L, Zn2+, Pd2+ and Pt2+ complexes showed the effective coordination sites. The ligand chelates in different modes as neutral and dibasic pentadentate (N3S2); neutral and dibasic tetradentate (N2S2). The Co2+, Ni2+ and Zn2+ complexes endorse mononuclear complexes while the rest avow binuclear complexes except for Pd2+ which showed trinuclear one. [CuAg(L)]NO3.EtOH was also proposed. The binuclear complexes have S bridge. An octahedral structure is proposed for the Co2+ and Ni2+ complexes while the Cu2+ and Mn2+ complexes capture square pyramid. The XRD patterns indicate crystalline nature for the studied complexes except for Pd2+ and Zn2+ which are amorphous. VO2+ complex has high activity as anti-bacillus and no activity as anti-saccharomyces.