Synthesis and Crystal Structures of N’-(3,5-Dichlorosalicylidene)-4-nitrobenzohydrazide and Its Dioxomolybdenum(VI) Complex

Abstract

A hydrazone compound N′-(3,5-dichlorosalicylidene)-4-nitrobenzohydrazide and its dioxomolybdenum(VI) complex have been synthesized and characterized by elemental analyses, infrared spectroscopy, and single-crystal X-ray determinations. The ligand crystallized in the monoclinic space group P2₁/n, with a = 7.402(1), b = 13.429(2), c = 16.668(2) Å, β = 99.718(2)°, V = 1633.0(4) ų, Z = 4, R ₁ = 0.0359, and wR ₂ = 0.0811. The complex crystallized in the monoclinic space group P2₁/c, with a = 13.443(1), b = 7.222(1), c = 18.997(2) Å, β = 91.889(2)°, V = 1843.2(3) ų, Z = 4, R ₁ = 0.0289, and wR ₂ = 0.0652. The asymmetric unit of the ligand contains a hydrazone molecule and a methanol molecule. In the complex, the Mo atom is coordinated by one hydrazone ligand, one methanol molecule, and two oxo O atoms, forming an octahedral coordination. The ligand coordinates to the Mo atom through the phenolate O, imine N, and enolic O atoms.

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Keywords:

• coordination compound
• crystal structure
• hydrazone
• hydrogen bonding
• molybdenum complex

Acknowledgments

The authors thank the Excellent Yong Teachers Program (No. 00511024) and China Postdoctoral Science Foundation (No. 2011M500989) for the financial support.