Chemical Name:
[Cr(NH3)6]Cl2 is known as hexaamminechromium(III) chloride.

IUPAC Name:
The IUPAC name for [Cr(NH3)6]Cl2 is hexaamminechromium(III) chloride.

Explanation:
- Hexaammine: This indicates that the central chromium ion (Cr) is coordinated to six ammonia (NH3) ligands.
- Chromium(III): This specifies the oxidation state of the chromium ion, which is +3 in this complex.
- Chloride: This denotes the counter ion present in the compound, in this case, chloride (Cl).
- The square brackets indicate that the species inside is a coordination complex.
- The Roman numeral (III) in parentheses after chromium signifies the oxidation state of the central metal ion.
- The coordination number of the chromium ion in this complex is 6, meaning it is coordinated to 6 ammonia ligands.
- The chloride ions (Cl-) act as counter ions to balance the charge of the complex.
In summary, [Cr(NH3)6]Cl2 is named hexaamminechromium(III) chloride according to IUPAC nomenclature rules.