Trichlorido{μ-6,6′-dimethoxy-2,2′-[cyclohexane-1,2-diylbis(nitrilomethanylylidene)]diphenolato}dimethanolcopper(II)samarium(III)

In the title hetero-dinuclear complex, [CuSm(C22H24N2O4)Cl3(CH3OH)2], the CuII cation is N,N′,O,O′-chelated by a 6,6′-dimethoxy-2,2′-[cyclohexane-1,2-diylbis(nitrilomethanylylidene)]diphenolate ligand, and one Cl− anion further coordinates to the CuII cation to complete the distorted square-pyramidal coordination geometry, while the SmIII cation is chelated by four O atoms from the same ligand, and is further coordinated by two methanol molecules and two Cl− anions in an bicapped trigonal–prismatic geometry. Intra- and intermolecular O—H⋯Cl hydrogen bonds are present in the structure.

In the title hetero-dinuclear complex, [CuSm(C 22 H 24 N 2 O 4 )-Cl 3 (CH 3 OH) 2 ], the Cu II cation is N,N 0 ,O,O 0 -chelated by a 6,6 0dimethoxy-2,2 0 -[cyclohexane-1,2-diylbis(nitrilomethanylylidene)]diphenolate ligand, and one Cl À anion further coordinates to the Cu II cation to complete the distorted square-pyramidal coordination geometry, while the Sm III cation is chelated by four O atoms from the same ligand, and is further coordinated by two methanol molecules and two Cl À anions in an bicapped trigonal-prismatic geometry. Intra-and intermolecular O-HÁ Á ÁCl hydrogen bonds are present in the structure.
of the title complex.
In the title complex, the Cu(II) ions is five-coordinated by two imino nitrogen atoms and two phenolate oxygen atoms from the ligand, and one chlorine atom. The Cu-N bond distances are 1.926 (4) Table 1). The Sm-Cu distance is 3.4292 (9) Å. The positive charge of the Sm(III) and Cu (II) ions are balanced by the ligand L 2and three chlorine anions (L = N,N′-bis(2-oxy-3-methoxybenzylidene) -1,2-diaminocyclohexane).

Experimental
The salen-type ligand was synthesized following the reference (Bao et al. 2010). To a 1:1 MeOH/CH 2 Cl 2 solution (20 mL) of LCuH 2 O (0.0980 g, 0.2 mmol) was added SmCl 3˙6 H 2 O (0.0728 g, 0.2 mmol) at the room temperature. After stirring for 12 h, the solution was filtered to remove the suspended particles. Yellow single crystals suitable for X-ray diffraction were obtained by slow diffusion of diethylether into the filtrate in five days.

Figure 1
The crystal structure of the title compound.

Trichlorido{µ-6,6′-dimethoxy-2,2′-[cyclohexane-1,2diylbis(nitrilomethanylylidene)]diphenolato}dimethanolcopper(II)samarium(III)
Crystal data [CuSm(C 22 where P = (F o 2 + 2F c 2 )/3 (Δ/σ) max = 0.007 Δρ max = 1.38 e Å −3 Δρ min = −1.22 e Å −3 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. omit 0 4 6 omit 2 9 4 omit 1 8 5 omit 3 6 3 omit -3 2 9 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 > 2sigma(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.

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