(a) [SnF5]~ has a polymeric structure consisting of chains with c/s-bridging F atoms. Draw a repeat unit of the polymer. State the coordination environment of each Sn atom, and explain how the overall stoichiometry of Sn:F=l:5 is retained in the polymer.
(b) Which of the salts Pbl2, Pb(NO3)2, PbS04, PbCO3, PbCl2 and Pb(O2CCFl3)2 are soluble in water?
(c) The IR spectrum of CICN shows absorptions at 1917, 1O60 and 230cm-1. Suggest assignments for these bands and justify your answer.
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