Abstract
AbstractA series of oxaloyldihydrazone ligands was prepared essentially by the usual condensation reaction between oxaloyldihydrazide and different aldehydes e.g. salicylaldehyde, 2-hydroxy-1-naphthaldehyde, 2-hydroxyacetophenone and 2-methoxy-benzaldehyde in 1:2 M ratio. The formed compounds were purified to give bis(salicylaldehyde)oxaloyldihydrazone (L1), bis(2-hydroxy-1-naphthaldehyde)oxaloyldihydrazone (L2), bis(2-hydroxyacetophenone)oxaloyldihydrazone(L3) and bis(2-methoxy-benzaldehyde)oxaloyldihydrazone (L4). All the oxaloyldihydrazones (L1–L4) and their relevant solid nickel(II) complexes have been prepared and structurally characterized on the basis of the elemental analyses, spectral (UV–vis, IR, mass and 1H NMR), magnetism and thermal (TG) measurements. The dihydrazones coordinate to the metal center forming mononuclear complexes with L1, L3 and L4 in addition to binuclear complex with L2. The metal center prefers tetrahedral stereochemistry upon chelation. The optical indirect band gap energy ...
Highlights
Hydrazones and their derivatives constitute a versatile class of organic compounds that are important for drug design, organocatalysis and for the syntheses of heterocyclic compounds (Barbazan et al, 2008)
The results showed that bis(2-hydroxy-1-naphthaldehyde)oxaloyldihydrazone (L2) has higher activity against S. racemosum than A. fumigatus and no activity against C. albicans, higher activity against S. pneumoniae than B. subtilis, lower activity against E. coli and no activity against P. aeruginosa
A series of nickel(II)-hydrazone complexes derived from oxaloyldihydrazones (L1-L4) obtained by usual condensation of oxaloyldihydrazide and some selected aldehydes, namely salicylaldehyde (L1), 2-hydroxynaphthaldehyde (L2), 2-hydroxyacetophenone (L3) and 2-methoxybenzaldehyde (L4) have been isolated in pure form
Summary
Hydrazones and their derivatives constitute a versatile class of organic compounds that are important for drug design, organocatalysis and for the syntheses of heterocyclic compounds (Barbazan et al, 2008). A lot of complexes derived from hydrazones [M = Cu(II), Ni(II), Pd(II), Co(II), V(IV) and Ru(II)] have been studied (Hassan et al, 2015), little complexes of oxaloyldihydrazone ligands have been identified (Hassan et al, 2015; Lal, Adhikari, Kumar, Chakraborty, & Bhaumik, 2002; Lal, Basumatary, Adhikari, & Kumar, 2008; Salavati-Niasari & Sobhani, 2008). Some hydrazone complexes have been incorporated in zeolite-Y by analogous methods and the resulting materials were inferred by various physicochemical characterization techniques (Ahmed, 2014; Ahmed & Mostafa, 2009; Ahmed & Thabet, 2011, 2015)
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
