(a) Describe the solid state structures of K3C60 and of
KCS. Comment on any physical or chemical properties of the compounds that are of interest.
(b) Comment on the use of lead(II) acetate in a qualitative test for H2S.
(c) In the [Et4NJr salt, the [C2S4]2- ion is non- planar; the dihedral angle between the planes containing the two CS2 groups is 90°. In contrast, in many of its salts, the [C204]2~ ion is planar. Deduce, with reasoning, the point groups of these anions.
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