Synthesis and crystal structure of a mixed bridged trinuclear Ni(II) complex derived from a tridentate NNO donor Schiff base ligand

Department of Chemistry, Bidhannagar College, EB-2, Sector-1, Salt Lake, Kolkata-700 064, India

E-mail: rituparna2040@yahoo.co.in

Manuscript received online 11 June 2019, accepted 21 August 2019

A new trinuclear Ni(II) complex [Ni₃ L₂ (o-(NO₂ )C₆ H₄ COO)₂ (µ_1,1-N₃ )₂ (CH₃OH)₂ ]·2H₂O (1) has been synthesized using a tridentate NNO donor Schiff base ligand, 1-[(3-dimethylamino-propylimino)-methyl]-naphthalen-2-ol (HL). Complex 1 has been characterized by X-ray crystallography, elemental analysis, IR and UV-Vis spectroscopy. Single crystal X-ray structure shows that complex 1 is a linear trinuclear Ni(II) complex containing µ₂ -phenoxido, µ_1,1-azido and syn-syn o-nitrobenzoato bridges between the terminal and the central Ni(II) ions. Complex 1 is crystallized in the monoclinic sp. gr. P21/c with the unit cell parameters a = 12.246(5) Å, b = 14.683(5) Å, c = 17.688(5) Å, and β = 104.208(5)º, Z = 2. The terminally coordinated methanol molecule involves in hydrogen bonding through the hydrogen atom H(7) with the oxygen atom O(22) of the solvent water molecule.