Dipole Moment in [Cr(NH3)6]Cl2
The dipole moment in [Cr(NH3)6]Cl2 can be explained by looking at the individual dipole moments of the molecules involved in the compound.

[Cr(NH3)6]Cl2
In this compound, the central chromium ion is surrounded by six ammonia (NH3) ligands. Each ammonia molecule has a dipole moment due to the difference in electronegativity between nitrogen and hydrogen. This results in a net dipole moment for each ammonia ligand.

Chromium Ion
The chromium ion itself may also have a dipole moment depending on its oxidation state and the distribution of electrons around the ion. However, in this case, the dipole moment of the chromium ion can be considered negligible compared to that of the ammonia ligands.

Chloride Ion
The chloride ion in the compound also has a dipole moment due to the difference in electronegativity between chlorine and the central chromium ion. This dipole moment of the chloride ion adds to the overall dipole moment of the compound.

Overall Dipole Moment
When we consider the dipole moments of the ammonia ligands and the chloride ion, the overall dipole moment of the compound [Cr(NH3)6]Cl2 is not zero. The dipole moments do not cancel each other out, resulting in a net dipole moment for the entire compound.
In conclusion, the dipole moment in [Cr(NH3)6]Cl2 is a result of the individual dipole moments of the ammonia ligands and the chloride ion, which do not cancel each other out, leading to a non-zero net dipole moment for the compound.