Give one example of a bidentate ligand. What is a ligand? Give example of bidentate ligand. Fac-Mer isomerism is associated with which of the following types of complexes? M is the central m EDTA is a bidentate ligand ligand. What are bidentate ligands? Give an example. There are more subtle aspects of chelation. For example, two different bidentate ligands may not necessarily bind to the metal in exactly the same way. In the drawing below, it's apparent that the three bidentate phosphine ligands, bis dimethylphosphino methane, bis dimethylphosphino ethane, and bis dimethylphosphino propane, do not all bind the metal with the same geometry.
In each case, the metal forms a different angle with the two phosphines. The term "bite angle" is frequently used to describe how different bidentate ligands will attach to metals at different angles. In the picture, the P-Pd-P angle appears to be about 90 degrees when dmpm is bound; in reality it is even smaller. With dmpe, the bite angle appears larger in the picture than the one for dmpm, and in reality it is larger, although not quite as large as it appears here.
Two different ligands that bind with two different bite angles will have different influences on the complex that forms. In fact, chemists often use these differences to "tune" the behaviour of transition metals that are used as catalysts for important properties. They might add similar ligands with different bite angles to see which one best promotes the desired catalytic reaction.
Many factors can influence the bite angle, including structural features of the bidentate ligand itself, the metal, and other ligands bound to the metal. However, a particular ligand will usually have a normal range of bite angles that it will be able to adopt under different circumstances. Certain ligands may have natural bite angles that work better in some cases than in others. Propose the optimum bite angle in each of the following geometries.
Certain ligands tend to give a certain range of bite angles. Use the suggested criterion to predict which ligand in each pair would give the larger bite angle.
Suggest which ligand in each pair would have the larger bite angle, and why. This site is written and maintained by Chris P. Overview and Key Difference 2. What are Bidentate Ligands 3. What are Ambidentate Ligands 4. Similarities Between Bidentate and Ambidentate Ligands 5. Bidentate ligands are molecules or anions that can bind to an atom via two coordinate covalent bonds.
Coordinate covalent bonds are a type of covalent bonds that are formed when an electron-rich chemical species donate lone electron pairs to an electron-deficient chemical species such as positively charged metal atoms. When ligands and cations bind in this way, a coordination compound is formed. The atom to which the ligands are bonded to is called the coordination center. A bidentate ligand has two donor atoms. This means, there are two atoms that can donate their lone electron pairs. Ambidentate ligands are molecules or ions that have two donor atoms but are capable of binding with an atom via only one donor atom at a time.
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