Content deleted Content added
m fixed lint errors – file options |
m fixed lint errors – file options |
||
Line 91:
[[File:Pb9 Cluster.png|thumb|150px|right|{{chem|Pb|10|2−}}]]
When counting electrons for each cluster, the number of [[valence electrons]] is enumerated. For each [[transition metal]] present, 10 electrons are subtracted from the total electron count. For example, in Rh<sub>6</sub>(CO)<sub>16</sub> the total number of electrons would be {{nowrap|6 × 9 + 16 × 2 − 6 × 10}} = {{nowrap|86 – 60}} = 26. Therefore, the cluster is a ''closo'' polyhedron because {{nowrap|1=''n'' = 6}}, with {{nowrap|1=4''n'' + 2 = 26}}.
[[File:S4 Cluster.png|thumb|150px|
Other rules may be considered when predicting the structure of clusters:
# For clusters consisting mostly of transition metals, any main group elements present are often best counted as ligands or interstitial atoms, rather than vertices.
| |||