Question

What is the number of donor atoms in dimethylglyoximato ligand?

• A. 1
• B. 2
• C. 3
• D. 4

Answer 1

The correct option is B

2

The correct answer is (B):

Explanation of the correct answer:

Dimethylglyoximato :

1. Dimethylglyoximato is also known as DMG and is an anionic ligand as a charge on it is -1.
2. It is actually a ligand whose denticity is defined as the number of lone pairs of electrons which can further be donated by a ligand to the central metal ion.
3. In this compound there is a presence of two Nitrogen atoms which are the donors, and the Oxygen which is present there in DMG is basically involved in the Hydrogen bonding .
4. As Oxygen is the atom which is involved in Hydrogen bonding because of which Oxygen atom can not be a donor.
5. So, as there are two donor atoms ($\mathrm{N}\mathrm{and}\mathrm{N}$) in dimethylglyoximato, so it is a bidentate ligand.
6. Hence, the number of donor atoms in dimethylglyoximato is 2
7. Structure for dimethylglyoximato is:

Therefore, the correct answer is (B) 2.