Formulate and briefly describe the structure of the diheteroatomic inorganic heterocycles SxNy.

Briefly describe the Keggin structure of heteropolyanions.

Chlorocyclopentadiene does not ionize easily in solution. It will ionize only when treated with a very strong Lewis acid such as antimony pentafluoride (SBF3). The product was found by electron paramagnetic resonance (epr) studies to have two unpaired electrons. Draw the structure formed when this molecule ionizes. Include all lone pairs in your structure. Ignore inorganic byproducts. H20, SbFs

A student adds bromine solution to a test tube containing an isomer of C3H6. After shaking the sample and exposing it to UV light, the student observes that the colour of the bromine solution changes from orange to clear. Provide a hypothesis for what happened in the test tube. What do you believe to be the structure of the original isomer, and what was the final product, if a reaction occurred?