Synthesis, crystal structure and e.p.r. spectra of one-dimensional manganese(II) 3,5-dinitrobenzoate dihydrate

The crystal structure of catena-diaquatetrakis(mu (2)-3,5-dinitrobenzoato-O ,O')manganese(II) has been determined by X-ray diffraction. It consists of a chain with the 3,5-dinitrobenzoate group acting in the syn-anti mu (2)-O, O'-bridging fashion, in which the Mn-II atom is octahedrally coordinated by two aqua ligands [2.162(3) Angstrom] and four carboxy oxygen atoms [Mn-O = 2.114(3) and 2.221(3) Angstrom]. The X-band e.p.r. spectra of this complex show a hyperfine structure due to Mn-II (I = 5/2) with a splitting factor (A) of 97 G at 5 K and 93 G at 19 K, respectively.