Synthesis, Structural Characterization, and Biological Application of p-[N,N-bis(2-chloroethyl) Aminobenzaldehyde Thiosemicarbazone and Its Nickel (II) Complex

Abstract

New complex of Ni(II) with p-[N,N-bis(2-chloroethyl)]aminobenzaldehyde thiosemicarbazone (CEABTSC) have been synthesized and characterized by elemental analysis, IR, electronic, and ¹H NMR spectroscopy. The crystal structure of the free ligand has been determined by single-crystal X-ray diffraction technique. The compound crystallizes in the Triclinic crystal system with space group P-1, Z = 2, Calculated density = 1.392 mg/m³, V = 761.64(18) A³ with unit cell parameters a = 8.2847(11) Å, α = 99.074°, b = 8.7432(12) Å, β = 94.035(7)°, c = 11.2423(15) Å, γ = 107.337(6)°; final R₁ and wR₂ are 0.0796 and 0.3021, respectively. The crystal structure reveals that the compound exists in the thione form and C12 and C11 are at E configuration to each other with respect to N2–N3 bond. The packing of the molecules in the crystal lattice is stabilized by intramolecular N(3)-H(3)…S(1) and N(4)-H(4D)…S(1) hydrogen bonds resulting in the formation of edge fused R₂²(8) ring motif. In the complex, thiosemicarbazone ligand is coordinated to nickel through (1:2 complex) SNNS mode. The complex has been tested for their antibacterial activity against various pathogenic bacteria.

Keywords::

• Schiff base
• thiosemicarbazone
• crystal structure of p-[N
• N-Bis(2-chloroethyl)aminobenzaldehyde thiosemicarbazone
• spectral studies