Synthesis and characterization of heterobimetallic Ni(II)–Zn(II) complexes from bis(2-hydroxy-1 -naphthaldehyde)succinoyldihydrazone

Abstract

Monometallic zinc(II) and nickel(II) complexes, [Zn(H 2 nsh)(H 2 O)] (1) and [Ni(H 2 nsh)(H 2 O) 2 ](2), have been synthesized in methanol by template method from bis(2-hydroxy-1-naphthaldehyde)succinoyldihydrazone (H 4 nsh). Reaction of monometallic complexes with alternate metal(II) acetates as a transmetallator in 1 : 3 molar ratio resulted in the formation of heterobimetallic complexes [NiZn(nsh)(A) 3 ] and [ZnNi(nsh)(A 0 ) 2 ] (A ¼ H 2 O (3), py (4), 2-pic (5), 3-pic (6), 4-pic (7)), (A 0 ¼ H 2 O (8), py (9), 2-pic (10), 3-pic (11), and 4-pic (12)). The complexes have been characterized by elemental analyzes, mass spectra, molar conductance, magnetic moments, electronic, EPR, and IR spectroscopies. All of the complexes are non-electrolytes. Monometallic zinc(II) is diamagnetic while monometallic nickel(II) complex and all heterobimetallic complexes are paramagnetic. The metal centers in heterobimetallic complexes are tethered by dihydrazone and naphthoxo bridging. Zinc(II) is square pyramidal; nickel(II) is six-coordinate distorted octahedral except [ZnNi(nsh)(A) 2 ], in which nickel(II) has square-pyramidal geometry. The displacement of metal center in monometallic complexes by metal ion has been observed in the resulting heterobimetallic complexes.

Synthesis, Characterization, and Structural Assessment of Ni(II) Complexes Derived from Bis(2-hydroxy-1-naphthaldehyde)succinoyldihydrazone

“…The complex thus obtained was filtered while hot, washed repeatedly with hot methanol and finally with ether, and dried over anhydrous CaCl 2 . Yield is 0.72 g. 2 ], Where A = Pyridine (py, 2); 2-Picoline(2-pic, 3); 3-Picoline (3-pic, 4); and 4-Picoline (4pic, 5). Complex [Ni(H 2 nsh)(H 2 O) 2 ] (1) (1.00 g, 1.86 mmol) was suspended in methanol (100 mL) accompanied by gentle stirring for 10 minutes at 50-60 ∘ C. To this suspension, pyridine (1.50 mL, 18.10 mmol) was added maintaining the molar ratio at 1 : 10.…”

“…We have previously described the synthesis and characterization of homobimetallic Mo(VI) complexes and Ni-Zn heterobimetallic complexes derived from the ligand bis(2-hydroxy-1-naphthaldehyde)succinoyldihydrazone [1,2]. Nickel is another metal ion from the first transition series which has been selected for the synthesis of its complexes with the title dihydrazone and their characterization.…”

“…Further, the reported existence of homobimetallic complexes derived from dihydrazones as ligands is quite meager [1,[17][18][19][20]. Moreover, there is only a single reported existence of homobimetallic complexes of dihydrazones containing succinoyl fraction and naphthyl fragments in their molecular skeleton [1,2].…”

Water Bath Sonicator As An Eco-friendly Technique for Synthesis of New Dihydrazide Hydrazone Derivatives

“…(Alarfaji, Ali, Bani-Fwaz, & Bedair, 2021). Another used of the similar these compounds are formation of complexes with metals (Kenie, Satyanarayana, & Shyamala, 2015;Lal et al, 2010). In fact, dihydrazide hydrazone compounds found in tautomeric isomers (Zhang et al, 2002) .Isomers are chemical entities that share the same formula but have distinct structures.…”