Effective bond length ratios

Earlandite structure, 6,849 Edge-coalesced icosahedra eleven-coordinate compounds, 1, 99 repulsion energy coefficients, 1,33,34 Edta — see Acetic acid, ethylenediaminetetra-Effective atomic number concept, 1,16 Effective bond length ratios non-bonding electron pairs, 1,37 Effective d-orbital set, 1,222 Egta — see Acetic acid,... 

Valence shell electron pair repulsion theory, 1,32-39 effective bond length ratios, 1.34 halogenium species, 3, 312 noble gas compounds, 3,312 repulsion energy coefficient, 1, 33 Valency... 

M—i and the metal-ligand bond M—j is determined by the effective bond length ratio , R itf). These empirical parameters can be successfully transferred from one stereochemistry to another, and even between different coordination numbers. 

The ligands oxide and nitride, O2- and N3, occupy even more space than do halide ions and have correspondingly lower effective bond length ratios R(02 [L) 0.6 R(02 /X ) 0.8. 

Figure 21 Bond angles (degrees) for [M(unidentate A)(unidentate B)5], as a function of effective bond length ratio R...

The form of this potential energy surface is critically dependent on the effective bond length ratio J (unidentate/bidentate). As 7 (unidentate/bidentate) becomes less than unity, stereochemistry C becomes very stable, a typical potential energy surface being shown in Figure 70. Conversely, as /i(unidentate/bidentate) increases, it is the other end of the potential energy trough that deepens,... 

Table 6 Effective Bond Length Ratios for a Non-bonding Pair of Electrons, / (lone pair/X)...

The stabilization of the dodecahedron for complexes of the type [M(unidentate A)4(unidentate 6)4] is shown by the potential energy surface in Figure 80, calculated for the effective bond length ratio /J(A/B) = 1.20. Figure 80 is directly comparable to Figure 78a, in which all metal-ligand bonds were equal. Figure 80 clearly shows that the dodecahedron at 0a — — 45" has been stabilized... 

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