91Ó°ÊÓ

Sketch the chiral isomers of \(\left[\mathrm{CrCl}_{2}(\mathrm{en})_{2}\right]^{+}\). Is there a non-chiral isomer of this complex?

Sketch the chiral isomers of \(\left[\mathrm{Co}\left(\mathrm{C}_{2} \mathrm{O}_{4}\right)_{3}\right]^{3-}\).

In which complex do we expect to find the larger \(\Delta\) ? (a) \(\left[\mathrm{Cr}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{2+}\) or \(\left[\mathrm{Cr}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{3+}\) (b) \(\left[\mathrm{Cr}(\mathrm{en})_{3}\right]^{3+}\) or \(\left[\mathrm{CrCl}_{6}\right]^{3-}\)

Arrange the following complexes in order of increasing wavelength of the light absorbed by them: \(\left[\mathrm{Cr}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{3+}\) \(\left[\mathrm{CrCl}_{6}\right]^{3-},\left[\mathrm{Cr}(\mathrm{en})_{3}\right]^{3+},\left[\mathrm{Cr}(\mathrm{CN})_{6}\right]^{3-},\left[\mathrm{Cr}\left(\mathrm{NO}_{2}\right)_{6}\right]^{3-},\) \(\left[\mathrm{CrF}_{6}\right]^{3-},\) and \(\left[\mathrm{Cr}\left(\mathrm{NH}_{3}\right)_{6}\right]^{3+}.\)

Which complex should absorb light at the longer wavelength? (a) \(\left[\mathrm{Fe}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{2+}\) or \(\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{4-}\) (b) \(\left[\mathrm{Mn}(\mathrm{CN})_{6}\right]^{3-}\) or \(\left[\mathrm{Mn}(\mathrm{CN})_{6}\right]^{4-}\)

Would the complex \(\left[\mathrm{Cr}(\mathrm{CN})_{6}\right]^{4-}\) more likely be low spin or high spin? Could it be diamagnetic?

\(\left[\mathrm{Ag}\left(\mathrm{NH}_{3}\right)_{2}\right]^{+}\) and \(\left[\mathrm{Ag}(\mathrm{CN})_{2}\right]^{-}\) are both linear complexes. Draw the crystal field energy level diagram for the \(d\) orbitals for a linear complex, if the ligands lie along the \(z\) -axis.

Sketch all of the isomers of \(\left[\mathrm{CoCl}_{2}(\mathrm{en})\left(\mathrm{NH}_{3}\right)_{2}\right]^{+} .\) Label the cis chloro and trans chloro isomers.