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


Affiliations
1 Department of Chemistry, University of Technology and Management, Shillong, Meghalaya 793003, India
2 Department of Chemistry, Indian Institute of Technology Patna, Bihar 801103, India
3 Department of Chemistry, North-Eastern Hill University, Shillong, Meghalaya 793022, India
 

The monometallic nickel(II) complexes [Ni(H2nsh)(A)2]⋅nH2O (where A = water (H2O), n = 0 (1); pyridine (py), n = 2 (2); 2-picoline(2-pic), n = 0 (3); 3-picoline(3-pic), n = 2 (4); and 4-picoline(4-pic), n = 0 (5)) and homobimetallic nickel(II) complexes [Ni2(nsh)(A)4]⋅nH2O (where A = water (H2O), n = 1 (6); pyridine (py), n = 4 (7); 2-picoline(2-pic), n = 4 (8); 3-picoline(3-pic), n = 4 (9); and 4-picoline(4-pic), n = 4 (10), resp.) have been synthesized in methanol from bis(2-hydroxy-1- naphthaldehyde)succinoyldihydrazone (H4nsh). The complexes have been characterized by elemental analyses, molar conductance, magnetic moment, and electronic and IR and TGA/DTA spectroscopic studies. The monometallic complexes (1) to (5) are found to have octahedral stereochemistry while complexes (6) to (10) are found to have distorted octahedral stereochemistry in which one of the Ni(II) centres is present in N2O2 coordination sphere and another Ni(II) centre is bonded to it through phenolate oxygen atoms via oxo-bridging.
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  • Synthesis, Characterization, and Structural Assessment of Ni(II) Complexes Derived from Bis(2-Hydroxy-1-Naphthaldehyde)succinoyldihydrazone

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Authors

Mithun Chakrabarty
Department of Chemistry, University of Technology and Management, Shillong, Meghalaya 793003, India
Aziz Ahmed
Department of Chemistry, Indian Institute of Technology Patna, Bihar 801103, India
R. A. Lal
Department of Chemistry, North-Eastern Hill University, Shillong, Meghalaya 793022, India

Abstract


The monometallic nickel(II) complexes [Ni(H2nsh)(A)2]⋅nH2O (where A = water (H2O), n = 0 (1); pyridine (py), n = 2 (2); 2-picoline(2-pic), n = 0 (3); 3-picoline(3-pic), n = 2 (4); and 4-picoline(4-pic), n = 0 (5)) and homobimetallic nickel(II) complexes [Ni2(nsh)(A)4]⋅nH2O (where A = water (H2O), n = 1 (6); pyridine (py), n = 4 (7); 2-picoline(2-pic), n = 4 (8); 3-picoline(3-pic), n = 4 (9); and 4-picoline(4-pic), n = 4 (10), resp.) have been synthesized in methanol from bis(2-hydroxy-1- naphthaldehyde)succinoyldihydrazone (H4nsh). The complexes have been characterized by elemental analyses, molar conductance, magnetic moment, and electronic and IR and TGA/DTA spectroscopic studies. The monometallic complexes (1) to (5) are found to have octahedral stereochemistry while complexes (6) to (10) are found to have distorted octahedral stereochemistry in which one of the Ni(II) centres is present in N2O2 coordination sphere and another Ni(II) centre is bonded to it through phenolate oxygen atoms via oxo-bridging.