cis-Chlorido(ethylamine)bis(propane-1,3-diamine)cobalt(III) dichloride

In the title compound, [CoCl(C2H7N)(C3H10N2)2]Cl2, the CoIII ion has a distorted octahedral coordination environment and is surrounded by four N atoms in the equatorial plane, with the other N and Cl atoms occupying the axial positions. The crystal packing is stabilized by N—H⋯Cl hydrogen bonds, forming a layered arrangement parallel to (1-10).

In the title compound, [CoCl(C 2 H 7 N)(C 3 H 10 N 2 ) 2 ]Cl 2 , the Co III ion has a distorted octahedral coordination environment and is surrounded by four N atoms in the equatorial plane, with the other N and Cl atoms occupying the axial positions. The crystal packing is stabilized by N-HÁ Á ÁCl hydrogen bonds, forming a layered arrangement parallel to (110).

Experimental
Crystal data [CoCl(C 2 Table 1 Hydrogen-bond geometry (Å , ). In recent years, considerable effort has been dedicated to the design and synthesis of supramolecular architectures of coordination complexes (Lehn, 1995;Khlobystov et al.,2001). The primary reason for the interest in such complexes is their new and versatile topologies and potential applications in functional materials (Desiraju, 1995;Seo et al., 2000).
The interaction of transition metal polyamine complexes of cobalt(III) with DNA has received considerable attention in the recent years. Using mixed ligand complexes, it is possible to systematically vary parameters of interest by changing the properties of the interacting units either by the use of suitable substituents or simply by changing the nature of ancillary ligand.
In addition, cobalt(III) complexes have received a sustained high level of attention due to their relevance in various redox processes in biological systems and act as promising agents for antitumor, anthelmintic, antiparasitic, antibiotic and antimicrobial activities, as well as their multiple applications in fields of medicine and drug delivery (Chang et al., 2010).
Against this background and to ascertain the molecular structure and conformation of the title compound, the crystal structure determination has been carried out.
The ORTEP plot of the molecule is shown in Fig. 1. The molecular geometry is not a perfect octahedron. The metal centre is surrounded by four N atoms in an equatorial plane, with the other N and Cl atoms occupying the axial positions.
The packing of the molecules viewed down the a axis is shown in Fig. 2. The packing is stabilized by N-H···Cl and N -H···N types of inter-and intramolecular interaction.
Experimental 2 grams of trans-[Co III (tn)2Cl 2 ]Cl solid was made in the path using 3-4 drops of water. To the solid mass, about 0.12M ethyl amine (EtNH 2 ) was dropped for 20 min and mixed well. The grinding was continued until the colour turned dull green to red (Bailar & Work, 1946). The reaction mixture was set aside until no further change was observed and the product was allowed to stand overnight. Finally, the solid was washed. The final solid was dissolved in 5-10 ml of water pre-heated to 70°C and allowed to crystallize using hot acidified water. Finally Microcrystalline pink color crystal was retrieved (yield 0.85 g). The crystals were filtered, washed with ethanol and dried over vacuum. X-ray quality crystals were obtained by recrystallization from hot acidified distilled water.

Refinement
All H atoms were discernable in a difference map. C-bound H atoms were positioned geometrically (C-H =0.93-0.97 Å) and allowed to ride on their parent atoms, with U iso (H) =1.5U eq (C) for methyl H atoms and 1.

Figure 1
The molecular structure of the title compound, showing the atomic numbering and displacement ellipsoids drawn at 30% probability level.  The packing of the molecules viewed down a axis. 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.

Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å 2 )
x y z U iso */U eq C1 0.7176 (