The crystal structure of (+)D-[N,N,N',N'-tetrakis-(2'-aminoethyl)-1,2-diaminoethane]cobalt(III) hexacyanocobaltate(III) dihydrate

The crystal structure of hexamminecobalt(III) hexacyanocobaltate(III): an accurate determination

“…Generally speaking, the interatomic distances based on the high-angle data seem to give more reasonable values, free from the asphericity of the electron clouds, except for the bonds involving hydrogen atoms. The Co-N bond distance is 1.972 (1)/k and is in agreement with the values 1.968 (11), 1.968 (10), 1.968 (8) Muto, Marumo & Saito, 1970;Konno, Marumo & Saito, 1973;Haser, de Broin & Pierrot, 1972). The C-N distance of 1.157 (2) may be compared with the value of 1.156 (4)A obtained from the mean value of ten independent C-N distances in the [Ni(CN)5] a-salt (Raymond, Corfield & Ibers, 1968) and with the value 1.154 (4)/k in H3[Co(CN)6] (Haser et al, 1972).…”

“…The site symmetry of the two cobalt atoms is 3. Since the shape and size of the two complex ions are well known (for example, Meek & Ibers, 1970;Muto, Marumo & Saito, 1970) -ray Crystallography (1959) were used. Corrections for anomalous dispersion were also included.…”

The crystal structure of potassium (−)546-trimethylenediaminetetraacetatocobaltate(III) dihydrate

“…This expansion of the angle N-Co-N' is evidently due to the fused ring formation. The distortion of the octahedron formed by the six corresponding atoms is not so marked as that observed in [Co(penten)] 3÷ (Muto, Marumo & Saito, 1970). The bonds Co-O(4) and Co-O(4') are collinear but the bonds Co-O(2) and Co-N' make an angle of 175.9 °.…”

(−)589-[l-N,N,N',N'-tetrakis(2'-aminoethyl)-1,2-diaminopropane]cobalt(III) hexacyanocobaltate(III) trihydrate

“…The interatomic distances and bond angles within the complex ions are listed in Table 4. The ligand acts as a sexidentate and forms a complex ion similar to [Co(penten)] 3+ (Muto, Marumo & Saito, 1970). The cobalt atom is surrounded octahedrally by six nitrogen atoms.…”