Coordinate Numbers and Geometries

[Cris_Flores_2F]

What is the connection between geometries and coordinate numbers? Does the coordination number tell you what the geometry of the molecule is?

[Bilan Guan 2H]

Coordination number is the number of ligands directly attached to the transition metal (central atom). I think it's similar to the areas of electron density when determining shape of the molecule but coordination number only count the bonds, not lone pairs. For example, octahedral shape has 6 areas of electron density (bonds and lone pairs) and the coordination number is 6, BUT coordination number doesn't involved lone pairs (6 bonds). Hope that helps!