Question

Bis(ethylenediamine)dichloro chromium(iii) formula

Answer 1

Abcdf ..............

Answer 2

The formula is $[Cr(en)_2Cl_2]^+$

Explanation:

Rules for writing formulas of coordination complex are given as:

1. Central metal is written first and then the ligands are written along with their prefixes.

2. The anion ligands are written before the neutral ligands.

3. If there are more than one anion ligands or neutral ligands then they are written in alphabetical order.

The given name of complex is Bis(ethylenediamine)dichloro chromium(iii)

In this, the central metal is chromium (Cr) and the ligands are ethylenediamine and chlorine.

Ethylenediamine is  neutral and chlorine has a charge of -1. As the oxidation state of chromium is +3 , the coordination complex must bear one positive charge.

The formula of Bis(ethylenediamine)dichloro chromium(III) is $[Cr(en)_2Cl_2]^+$

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