Diazidobis[(1-methyl-1H-benzimidazol-2-yl)methanol-κ2 N 3,O]manganese(II)

The title complex, [Mn(N3)2(C9H10N2O)2], possesses crystallographically imposed twofold symmetry. The MnII atom is coordinated by four N atoms and two O atoms in a distorted octahedral geometry. The crystal packing is stabilized by strong intermolecular O—H⋯N hydrogen bonds.

The title complex, [Mn(N 3 ) 2 (C 9 H 10 N 2 O) 2 ], possesses crystallographically imposed twofold symmetry. The Mn II atom is coordinated by four N atoms and two O atoms in a distorted octahedral geometry. The crystal packing is stabilized by strong intermolecular O-HÁ Á ÁN hydrogen bonds.

Comment
The coordinated modes of (1-methyl-1H-benzimidazol-2-yl)methanol ligand are similar to our previously repored benzimidazol-2-yl methanol from the structural point, the latter has been shown to bind to cobalt(II) as a neutral chelate (Zeng et al., 2006, Zhou et al., 2007. This feature is also preserved in the present manganese(II) complex.
In the title compound, the ligand chelates through the hydroxyl O and imino N atoms, resulting in a N 4 O 2 Mn octahedral geometry at the metal center ( Fig. 1, Table 1), like that observed in copper (Hamilton et al., 1979) and nickel (Alagna et al., 1984) adducts. In this structure, the azide anion as a terminal ligand coordinated to Mn II atom, and N-N-N bond lengths and bond angle are close to compound [Cu(tbz)(N 3 ) 2 ] 2 (CH 3 OH) 2 (tbz = bis(2-benzimidazolyl)propane) (Albada et al., 1995).The complex possesses crystallographically imposed twofold symmetry. The crystal packing is stabilized by strong intermolecular O-H···N hydrogen bonds which extend along the crystallographic twofold rotation axis (Fig. 2, Table 2).

Refinement
The C-bound H atoms were placed in calculated positions (C-H = 0.93-0.98 Å) and included in the refinement in the riding-model approximation, with U iso (H) = 1.2(1.5)U eq (C, C methyl ). The hydroxy H atom has been located in a difference Fourier map and refined isotropically with a distance restraint of O-H = 0.85 (1) Å, and U iso (H) = 1.2U eq (O). Fig. 1. Anisotropic displacement ellipsoid plot of the [Mn(II)(N 3 ) 2 (C 9 H 10 N 2 O) 2 ] molecule at the 50% probability level; hydrogen atoms are drawn as sphere of arbitrary radius. Symmetry codes: (i) -x, y, -z + 1/2, for the unlabelled atoms.  as those based on F, and R-factors based on ALL data will be even larger.

Figures
In Checkcif report, the following ALERTS were generated PLAT230_ALERT_2_C Hirshfeld Test Diff for N3 -N4.. 5.98 su Author response: It is due to electron shift or resonance (N=N-N or N-N=N) bond lengths appear shorter than expected, see: Albada et al. (1995).
Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å 2 )