Crystal Structure and Thermodecomposition Kinetics of Mn(II) Complex with 1-Phenyl-3-Methyl-4-Benzoyl-5-Pyrazolone

Abstract  

The complex Mn(PMBP)₂(CH₃OH)₂] of manganese(II) with 1-phenyl-3-methyl- 4-benzoyl-5-pyrazolone (PMBP) was prepared and characterized by elemental analysis, thermal analysis, IR. The crystal structure of the complex determined by single crystal X-ray analysis, indicates that PMBP is a bidentate ligand in the complex and Mn(II) atom is six-coordinated and is in a meridional octahedral environment. The compound crystallizes in the monoclinic system, space group P ₂(1)/c, with a = 11.038(10) ?, b = 16.254(15) ?, c = 9.540(9) ?, α = 90.00°, β = 105.112(10)°, γ = 90.00°, V = 1,652(3) ?³, D _x  = 1.354 g cm⁻³ and Z = 2. The thermal decomposition kinetics of the complex was investigated under nonisothermal conditions using the Achar differential method and the Coats–Redfern integral method.