Cobalt(II) complexes with pentadentate Schiff bases 2,6-diacetylpyridine hydrazones: Syntheses and structures

Crystal Engineering of Schiff Base Zn(II) and Cd(II) Homo- and Zn(II)M(II) (M = Mn or Cd) Heterometallic Coordination Polymers and Their Ability to Accommodate Solvent Guest Molecules

“…The CSD analysis results and our own attempts [ 26 , 27 , 28 ] encouraged our interest to find the optimal synthetic method of obtaining Zn(II)/Cd(II) CPs based on H 2 L. Thus, three homo-, [CdL] n ( 1 ), {[CdL]∙0.5 dmf∙H 2 O} n ( 2 ) and {[ZnL]∙0.5 dmf∙1.5H 2 O} n ( 3 ), and two heterometallic, {[Zn 0.75 Cd 1.25 L 2 ]∙dmf∙0.5H 2 O} n ( 4 ) and {[MnZnL 2 ]∙dmf∙3H 2 O} n ( 5 ), CPs have been prepared in similar solvothermal conditions, where H 2 L reveals its new coordination fashions. Alongside crystallographic studies, the Hirshfeld surface analysis was performed in order to examine intermolecular interactions within the crystal.…”

“…The 2,6-diacetylpyridine bis(nicotinoylhydrazone) ligand (H 2 L) can be a heptadentate ligand having both N- and O- donor set atoms, which are liable to coordinate to various transition metal atoms as neutral, anionic or cationic forms, presenting tetra-, penta- or hexadentate coordination fashions [ 26 , 27 , 28 ]. Our recent published tetranuclear coordination compound [Cu 4 (HL) 4 (OH) 2 ](NO 3 ) 2 ∙6.75H 2 O [ 26 ] is the first example in which H 2 L shows unprecedented coordination mode involving one pyridine ring of nicotinamide moiety in bridging metal coordination.…”

Synthesis and Characterization of Novel Schiff Base Complexes of Cu (II), Cd (II), Ni (II), and Co (II) Ions with N'-(4-Nitrobenzylidene) Isonicotinohydrazide

“…They are precursors of possible antidiabetic medications and have been utilized extensively as intermediates for the synthesis of numerous medically significant heterocyclic chemical species [7]. These compounds have found wide range of application in building blocks for several biologically significant heterocyclic compounds, including those with anti-diabetic, anti-mycotic [8], anti-malarial, anti-proliferative [9], anticonvulsant [10], genotoxic [11], and antidepressant properties [12]. A variety of synthetic chemical processes, physiologically active compounds, pigments, plant growth regulators, and more could be catalyzed by Schiff bases [13].…”