Chemistry Forums for Students > Problem of the Week Archive

Problem of the week - 24/09/2012

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Borek:
Simple alkene, gaseous at RTP, reacts with a highly toxic red-brown gas producing a chiral compound that contains 21.17% 20.68% of chlorine. Very similar compound, with a lower molar mass but higher percent chlorine content, is optically inactive. Identify the alkene and the gas.

fledarmus:
I believe I've identified the gas, I have the empirical formula for the first compound, and I can't come up with a structure that matches the formula.

Borek:
Sigh. I hate myself. I did some stupid mistake again and in a place where I would never expect it  :'( And while I would understand many other errors, I don't understand where this one came from. I need either new glasses or new brain. Or both.

Try now, with the corrected percentage. Sorry for wasting your time :(

fledarmus:
It's all good  :D

New empirical formula, I have two possibilities for the gas, my only question now is what counts as "very similar"?

Borek:
Similar in terms of similar reagents and similar reaction  :P

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