# How many electrons do ligands donate?

**six electrons**depending on the hybridization of the oxygen atom.

Accordingly, how many electrons does Cyclopentadienyl donate?

neutral counting: Fe contributes **8 electrons**, the 2 cyclopentadienyl-rings contribute 5 each: 8 + 2 × 5 = **18 electrons**.

Furthermore, what is 18 electron rule with example? Compounds that obey the **18**-**electron rule** are typically "exchange inert". **Examples** include [Co(NH_{3})_{6}]Cl_{3}, Mo(CO)_{6}, and [Fe(CN)_{6}]^{4}^{−}. In such cases, in general ligand exchange occurs via dissociative substitution mechanisms, wherein the rate of reaction is determined by the rate of dissociation of a ligand.

In this way, how many electrons does no donate?

Using the neutral **electron** counting scheme, Cr has 6 d **electrons** and **NO**· has one **electron** for a total of 7.

How do you calculate number of electrons?

Determine the total valence **electrons** (TVE) in the entire molecule (that is, the number of valence **electrons** of the metal plus the number of **electrons** from each ligand and the charge); say, it is A. Subtract this number from n × 18 where n is the number of metals in the complex, that is, (n × 18) – A; say, it is B.