Octahedral groups

Table V summarizes the precursor complexes containing three or only one coordinated phenolato group. Octahedral complexes of the type [M(L,BuMet)-(Ph2acac)]+ or [M(L,BuMet)(Bu2acac)]+ (M = Cr111, Mnm, or Gam) display a reversible one-electron oxidation in the rather narrow potential range +0.24-0.51 V irrespective...

The A%-electron group. Octahedral molecules and ions of this group are more numerous, and include ... 

Molecular Shapes with Six Electron Groups (Octahedral Arrangement)... 

Figure 8-3 Arrangements of bonded atoms and lone pairs (six electron groups—octahedral electronic geometry).

All bonding groups octahedral shape (AXg). When seesaw-shaped SF4 (discussed above) reacts with more F2, the central S atom expands its valence shell further to form octahedral sulfur hexafluoride (SFg) ... 

Ni(2-C7H4NS CH20H)2(NCS)2 440-290 3.14 -28 Farad probably dimeric, bridging NCS groups octahedral coordination 71A21, Fig. 157,158... 

Mulliken symbols The designators, arising from group theory, of the electronic states of an ion in a crystal field. A and B are singly degenerate, E doubly degenerate, T triply degenerate states. Thus a D state of a free ion shows E and Tj states in an octahedral field. 

The Couplitig-Coefficierits lJ ABC abc) for the Complex Form of a Doubly Degenerate Representation in the Octahedral Group, Following G. F. Koster et al.. Properties of tke Thirt i-Two Point Groups, MIT Press, MA, 1963, pp, 8, 52. 

Chromium forms a white solid, hexacarhonyl, Cr(CO)j, with the chromium in formal oxidation state 0 the structure is octahedral, and if each CO molecule donates two electrons, the chromium attains the noble gas structure. Many complexes are known where one or more of the carbon monoxide ligands are replaced by other groups of ions, for example [CrfCOlsI] . 

Cobalt compounds have been in use for centuries, notably as pigments ( cobalt blue ) in glass and porcelain (a double silicate of cobalt and potassium) the metal itself has been produced on an industrial scale only during the twentieth century. Cobalt is relatively uncommon but widely distributed it occurs biologically in vitamin B12 (a complex of cobalt(III) in which the cobalt is bonded octahedrally to nitrogen atoms and the carbon atom of a CN group). In its ores, it is usually in combination with sulphur or arsenic, and other metals, notably copper and silver, are often present. Extraction is carried out by a process essentially similar to that used for iron, but is complicate because of the need to remove arsenic and other metals. 

This is the point group to which all regular octahedral molecules, such as SFe (Figure 4.12b) and [Fe(CN)6], belong. 

All regular fefrahedral molecules, which belong to fhe poinf group (Section 4.2.8), may show such a rofational spectrum. However, those spherical rotors that are regular octahedral molecules and that belong to the Of, point group (Section 4.2.9) do not show any such... 

For a spherical rotor belonging to the octahedral Of, point group, Table A.43 in Appendix A, in conjunction with the vibrational selection rules of Equation (6.56), show that the only allowed transitions are... 

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