1.3.5- Tris cyclohexane metal complexes

Trithiane, S3(CH2)3 a chair-shaped molecule like cyclohexane, forms many metal complexes. Two silver compounds have layer structures based on the 6-gon net. In both structures Ag is tetrahedrally coordinated, the fourth ligand (X in Fig. 3.23(a)) being H2O in Ag(trithiane)C104. H2O and 0 of NOJ in Ag(tri-thiane)N03. H2O (JCS A 1968 93). Silver tricyanmethanide, Ag[C(CN)3], has a... 

The compounds that we will study are tris-bidentate complexes with trans-cyclohexane-1,2-diamine (see Section 17.6). We start from [Co(NH3)6]3+ (see Section 17.1). Using the usual tools in HyperChem, edit that complex so that it has six identical Co-N distances of 1.955 A and valence angles involving Co of 90° or 180°. Select the cobalt and the six nitrogen atoms with the select tool and save this structure make sure that the same name also appears as the MOMEC input structure (Setup/Files/Input). Open the module that allows you to compute the structure with the metal center and the six donor atoms fixed Execute/Rigid Geo-metry/Fixed Coordinates. Read File will mark the coordinates to be fixed, i.e., the x,y,z coordinates of the atoms that you have selected in HyperChem. The window shown in Fig. 17.20.1 will appear. 

---