Diaqua(2,6-dioxo-1,2,3,6-tetrahydropyrimidin-3-ide-4-carboxylato-κ2 N 3,O 4)(1,10-phenanthroline-κ2 N,N′)manganese(II)

The title compound, [Mn(C5H2N2O4)(C12H8N2)(H2O)2], was synthesized by the reaction of manganese(II) acetate and orotic acid in the presence of 1,10-phenanthroline. The crystal structure exhibits intermolecular N—H⋯O and O—H⋯O hydrogen bonds . The Mn coordination environment consists of an N3O3 donor set in an octahedral geometry.

The title compound, [Mn(C 5 H 2 N 2 O 4 )(C 12 H 8 N 2 )(H 2 O) 2 ], was synthesized by the reaction of manganese(II) acetate and orotic acid in the presence of 1,10-phenanthroline. The crystal structure exhibits intermolecular N-HÁ Á ÁO and O-HÁ Á ÁO hydrogen bonds . The Mn coordination environment consists of an N 3 O 3 donor set in an octahedral geometry.

Comment
Manganese is an important element in organisms and involved in many biochemical processes (Mukhopadhyay et al., 2004 andRen et al., 2005). It may be observed in the active parts of many enzymes. Orotic acid (2, 6-dioxo-1, 2, 3, 6-tetrahydropyrimidine-4-carboxylic acid), an important pyrimidine derivative as the effective precursor in the biosynthesis of pyrimidine base of nucleic acids in living organisms, plays an important role in bioinorganic chemistry and pharmaceutical studies (Lieberman et al., 1955), material science, coordination chemistry and other aspects (Darensbourg et al., 1998).
Many complexes of the orotate ligand have been reported (Hambley et al., 1995).
In the title compound (Fig, 1), Mn(C 12 H 8 N 2 )(C 5 H 2 N 2 O 4 )(H 2 O) 2 , the Mn(II) ion is coordinated by N and O atoms from the orotate (2, 6-dioxo-1, 2, 3, 6-tetrahydropyrimidine-4-carboxylate) ligand. The bond lengths and angles are in good agreement with reported values (Nepveu et al., 1995). In the crystal structure, the molecule with its two coordinated water molecules is linked into infinite chains by O-H···O and N-H···O hydrogen bonds.
After evaporation of the solution for two weeks, colorless block-like crystals were isolated by filtration. Analysis, calculated for C 17 H 14 N 4 O 6 Mn: C 48.01, H 3.32, N 13.17; found: C 48.00, H 3.30, N 13.16. Crystals suitable for single-crystal X-ray analysis were selected directly from the sample.