A new oxo centered basic p-chlorobenzoate bridging heterotrinuclear complex, [Cr2MnO(C7H4O2Cl)(6)(Py)(3)]C7H5O2Cl: Synthesis, X-ray crystal structure and theoretical DFT study

作者：Khosravi Iman; Mirzaei Masoud^*; Bauza Antonio; Frontera Antonio; Eftekhar Melika

来源：Polyhedron, 2014, 81: 349-355.

DOI：10.1016/j.poly.2014.06.036

• mu(3)-Oxo bridge
• Heterotrinuclear complexes
• Halogen bonding
• X-ray crystallography
• DFT calculations

The direct reaction between p-chlorobenzoic acid and metal nitrate salts resulted in the formation of a novel heterometallic mu(3)-oxo trinuclear cluster with the formula [(Cr2MnO)-Mn-III-O-II(C7H4O2Cl)(6)(Py)(3)]C7H5O2Cl (1), which has been characterized by elemental analysis, electronic and IR spectra, and single-crystal X-ray crystallography. The electronic spectrum of the complex exhibited two spin-allowed bands for Cr-III in the regions 17900 and 22750 cm(-1), which could be assigned to the transitions from (4)A(2)g((F)) to (4)T(2)g((F)) and (4)T(1)g((F)), respectively. We have also examined the Cambridge Structural Database to investigate the abundance of this type of complex in terms of the trivalent/divalent metal ions and the hetero/homometallic nature of the trinuclear cluster. We have studied the relative stability of the different cluster situations, calculating the energetic costs of a series of metal substitution reactions by means of high level OFT calculations. Moreover, we have analyzed the effect of the p-chlorine substituent in benzoic acid, since the formation of halogen bonding interactions in the solid state are important in determining the crystal packing of 1.

• 出版日期2014-10-15