Question

How to write iupac name for coordination compounds

Answer 1

Answer:

Name the ligands first, in alphabetical order, then the metal atom or ion. remember The metal atom or ion is written before the ligands in the chemical formula.

Explanation:

Cr(NH3)3(H2O)3]Cl3

Answer: triamminetriaquachromium(III) chloride

Solution: The complex ion is inside the parentheses, which is a cation.

The ammine ligands are named before the aqua ligands according to alphabetical order.

Since there are three chlorides binding with the complex ion, the charge on the complex ion must be +3 ( since the compound is electrically neutral).

From the charge on the complex ion and the charge on the ligands, we can calculate the oxidation number of the metal. In this example, all the ligands are neutral molecules. Therefore, the oxidation number of chromium must be same as the charge of the complex ion, +3.