Bis{(E)-2-methoxy-6-[(4-methylphenyl)iminomethyl]phenolato}zinc(II)

The title compound, [Zn(C15H14NO2)2], contains a four-coordinate Zn atom located on a twofold rotation axis that exhibits a distorted tetrahedral geometry by two phenolate O atoms and two azomethine N atoms of the Schiff base 2-methoxy-6-[(4-methylphenyl)iminomethyl]phenolate ligands.

The title compound, [Zn(C 15 H 14 NO 2 ) 2 ], contains a fourcoordinate Zn atom located on a twofold rotation axis that exhibits a distorted tetrahedral geometry by two phenolate O atoms and two azomethine N atoms of the Schiff base 2methoxy-6-[(4-methylphenyl)iminomethyl]phenolate ligands.

Bis{(E)-2-methoxy-6-[(4-methylphenyl)iminomethyl]phenolato}zinc(II)
Hui-Duo Xian, Jian-Feng Liu, Hua-Qiong Li and Guo-Liang Zhao S1. Comment Schiff base ligands derived from substituted salicylaldehyde and aniline and their metal complexes have been widely investigated because of their novel structural features (Müller et al., 2001;Bhattacharyya et al., 2002). They include complexes with a methoxy group in the ortho position as the methoxy group can also bind to the metal. Such Schiff bases behave as bidentate ligands to divalent first-row transition metals (Zhou & Zhao, 2007). Similar cobalt (II) complexes have been reported by Iyere et al. (2004). Here, we describe the synthesis and crystal structure of a zinc complex, (I), of a  (Yu et al., 2007) in which Zn is coordinated by the methoxy O atom and the azomethine N atom.

S2. Experimental
The ligand was prepared by the direct solid-phase reaction of o-vanillin (10 mmol, 1.5251 g) and p-toluidine (10 mmol, 1.0700 g). The reactants were ground in an agate mortar. The colour of the mixture changed from light yellow to orange.
A solution of Zn(C 2 O 4 ) (1 mmol, 0.153 g) in methanol (10 ml) was added to a methanol solution of the Schiff base ligand (2 mmol, 0.48 g). orange crystals were isolated after two weeks.

Special details
Geometry. All e.s.d.'s (except the e.s.d. in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell e.s.d.'s are taken into account individually in the estimation of e.s.d.'s in distances, angles and torsion angles; correlations between e.s.d.'s in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell e.s.d.'s is used for estimating e.s.d.'s 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 R-factors(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.