How does the complex formation process vary between unidentate and bidentate ligands?
Understand the Problem
The question is asking us to compare the complex formation process between unidentate and bidentate ligands, with an emphasis on how the steps of formation differ based on the type of ligand. We need to analyze the characteristics of these ligands and their stability in forming complexes to identify the correct option.
Answer
Unidentate ligands bind through one site; bidentate through two, creating more stable chelates.
The formation of complexes involving unidentate ligands involves binding through a single donor site to the central metal atom, while bidentate ligands attach through two donor sites, forming more stable chelate complexes.
Answer for screen readers
The formation of complexes involving unidentate ligands involves binding through a single donor site to the central metal atom, while bidentate ligands attach through two donor sites, forming more stable chelate complexes.
More Information
Bidentate ligands generally form more stable complexes due to the chelate effect, which arises because forming two bonds with a single ligand is more entropically favorable than with two separate ligands.
Tips
Confusing bidentate and unidentate ligands is common; remember 'bi' means two donor sites, while 'uni' is one.
Sources
- The Differentiation between Unidentate and Bidentate Ligands - ACS Publications - pubs.acs.org
- 8.7: Bonding in Coordination Complexes - Chemistry LibreTexts - chem.libretexts.org
- Complexes and Ligands Element (28.2.1) | CIE A-Level Chemistry - tutorchase.com
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