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Nickelocene is the organonickel compound with the formula Ni(η5-C5H5)2. Also known as bis(cyclopentadienyl)nickel or NiCp2, this bright green paramagnetic solid is of enduring academic interest,[1] although it yet has no practical applications.

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In October 2010 the Nobel Prize for Physics was won by Andre Geim and Constantin Novoselov at Manchester University for their work on graphene