Question

explain sidgwicks electronic theory ​

Answer 1

Answer:

The Sidgwick's electronic theory explains the formation of coordination compounds. ... The Sidgwick's electronic theory explains the formation of coordination compounds. According to this theory, coordinate bonds are formed when the ligands donate the electron pairs to the central metal ion. a.

Answer 2

Sidgwick's electronic theory states that the formation of coordination complexes takes place when ligands donate electrons to the central metal ion.

Explanation:

• The term 'Effective Atomic Number' (EAN) is used in coordination chemistry.
• This was the first theory that explained the formation of coordination complexes.
• It was introduced by Sidgwick and is also known as Sidgwick's electronic theory.
• According to this theory, the donation of electrons takes place from ligands to the central metal ion. This results in the formation of coordinate bonds and thus, coordination complexes are formed.
• For example, $\[[Fe{(CO)_5}]\]$ is a coordination complex in which $\[Fe\]$ is the central metal and 5 $\[CO\]$ are ligands.
• These five $\[CO\]$ donate one electron each as $\[CO\]$ is a monodentate ligand.
• Thus, a coordination complex is formed in which the coordination number of central metal is 5.
• The EAN of the complex is given as:

        $\[\begin{gathered} EAN = (z - x) + 2nL \hfill \\ EAN = (26 - 0) + 2 \times 1 \times 5 \hfill \\ EAN = 36 \hfill \\ \end{gathered} \]$

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