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For understanding the shape of a coordination compound/complex, is this based off of the coordination number? Do polydentate ligands contribute to the shape differently than a monodentate ligand, and if so, how? Thank you!
The shape of the ligand is based on the VSEPR shape around the central atom. By knowing the shape of the ligand, you can see how it could possible bind to the metal in what locations, and then figure out the general shape of the complex as a whole.
Dr. Lavelle also said in class that the shape of certain ligands make it easier for them to chelate. For example, although ethylenediamine has its nitrogen atoms at opposite ends of the molecule, its large shape allows it to reach and bind to two points of a central metal atom.
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