[Cr(H2O)6]Cl3 has a magnetic moment of 3.83 B.M. The correct distribution of 3delectrons in the chromium of the complex is
3dxy1,3dyz1,3dz2
3d1xy,3d1yz,3d1zx
3dx2−y21,3d1z2,3d1xz
3dxy1,3d1x2−y2,3d1y2
3.83=nn+2 so, n=3
So, these are three unpaired e-s. Based on crystal field splitting the orbital of t2g set have one e- each.