Bis[2-(cyclopropyliminomethyl)-5-methoxyphenolato]zinc(II)

In the title complex, [Zn(C11H12NO2)2], the Zn2+ ion (site symmetry 2) is coordinated by two N,O-bidentate Schiff base ligands, generating a tetrahedral ZnO2N2 geometry for the metal ion.

In the title complex, [Zn(C 11 H 12 NO 2 ) 2 ], the Zn 2+ ion (site symmetry 2) is coordinated by two N,O-bidentate Schiff base ligands, generating a tetrahedral ZnO 2 N 2 geometry for the metal ion.
The title zinc complex, Fig. 1, possesses crystallographic two-fold rotation axis symmetry. The Zn atom is coordinated by two phenolic oxygen and two imino N atoms from two Schiff base ligands, generating a tetrahedral geometry. The bond lengths and angles (Table 1) around the Zn atom are typical and comparable to those in other Schiff base zinc(II) complexes (Wei et al., 2007;Li & Zhang, 2005;Parvez & Birdsall, 1990;Cui et al., 2009).
After keeping the solution in air for a few days, colourless blocks of (I) were formed.

Refinement
Hydrogen atoms were placed in calculated positions and constrained to ride on their parent atoms with C-H distances in the range 0.93-0.97 Å, and with U iso (H) set at 1.2U eq (C) and 1.5U eq (methyl C). Fig. 1. The molecular structure of (I), showing 30% probability displacement ellipsoids. Unlabeled atoms are at the symmetry position 1 -x, y, 3/2 -z.

Special details
Geometry. All esds (except the esd in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell esds are taken into account individually in the estimation of esds in distances, angles and torsion angles; correlations between esds in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell esds is used for estimating esds involving l.s. planes.
Refinement. Refinement of F 2 against ALL reflections. The weighted R-factor wR and goodness of fit S are based on F 2 , conventional R-factors R are based on F, with F set to zero for negative F 2 . The threshold expression of F 2 > σ(F 2 ) is used only for calculating Rfactors(gt) etc. and is not relevant to the choice of reflections for refinement. R-factors based on F 2 are statistically about twice as large as those based on F, and R-factors based on ALL data will be even larger.

Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å 2 )
x y z U iso */U eq  (4)