Name this compound with explanation vividly (CrCl2(H2O)3No3)Cl.2H2O
Chemistry
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8 stepsLet's break down the naming of the coordination compound CrCl₂(H₂O)₃NO₃Cl·2H₂O step by step.
The compound can be separated into the complex ion, the counter ion, and the water of crystallization:
[CrCl₂(H₂O)₃NO₃]⁺ Cl⁻ · 2H₂O
Identify the central metal atom.
- The central metal atom is Chromium (Cr).
Identify the ligands inside the coordination sphere.
- There are three types of ligands:
- H₂O: called aqua (neutral ligand)
- Cl⁻: called chloro (anionic ligand)
- NO₃⁻: called nitrato (anionic ligand)
- There are three types of ligands:
Determine the number of each ligand and their prefixes.
- Three H₂O ligands: triaqua
- Two Cl⁻ ligands: dichloro
- One NO₃⁻ ligand: nitrato
Determine the oxidation state of the central metal.
- Let the oxidation state of Cr be x.
- The charge of H₂O is 0.
- The charge of Cl⁻ is -1.
- The charge of NO₃⁻ is -1.
- The counter ion outside the coordination sphere is Cl⁻, which has a charge of -1. This means the complex ion [CrCl₂(H₂O)₃NO₃] must have a charge of +1 to balance it.
- So, for the complex ion: x + 2(-1) + 3(0) + 1(-1) = +1
- x - 2 + 0 - 1 = +1
- x - 3 = +1
- x = +4
- Therefore, the oxidation state of Chromium is (IV).
Name the complex ion.
- Ligands are named in alphabetical order (ignoring prefixes): aqua, chloro, nitrato.
- Combine the ligand names with their prefixes, followed by the metal name and its oxidation state in Roman numerals.
- triaquodichloronitratochromium(IV)
Name the counter ion.
- The ion outside the coordination sphere is Cl⁻, which is chloride.
Include the water of crystallization.
- There are two molecules of water outside the coordination sphere, so it's dihydrate.
Combine all parts to form the full name.
- The full name is triaquodichloronitratochromium(IV) chloride dihydrate.
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