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21 December 2011: IMAGE OF THE YEAR
A molecular star is born! Solved on I19, the X-ray crystal structure of a 160-atom-loop molecular pentafoil knot featuring iron ions (shown in purple), oxygen atoms (red), nitrogen atoms (dark blue), carbon atoms (shown in metallic grey, with one of the building blocks shown in light blue) and a single chloride ion (green) at the centre of the structure. Find out more… Image credit: Robert W. McGregor

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