The reaction of \(\mathrm{TeCl}_{4}\) with \(\mathrm{PPh}_{3}\) in THF solution in
air leads to the formation of the salt \(\left[\left(\mathrm{Ph}_{3}
\mathrm{PO}\right)_{2} \mathrm{H}\right]_{2}\left[\mathrm{Te}_{2}
\mathrm{Cl}_{10}\right]\) Structural data reveal that each Te centre in the
anion is in an approximately octahedral environment. (a) Suggest a structure
for \(\left[\mathrm{Te}_{2} \mathrm{Cl}_{10}\right]^{2-}\) (b) The cation
\(\left[\left(\mathrm{Ph}_{3} \mathrm{PO}\right)_{2} \mathrm{H}\right]^{+}\) is
derived from the phosphine oxide \(\mathrm{Ph}_{3} \mathrm{PO}\). Suggest a
structure for the cation and comment on its bonding.
