Template:Oroboros picture of the month

The Ouroboros in Applied Chemistry An ouroborand is presented in the publication by Durola and Rebek (2010), which in its cavity coordinates an internal side chain and looks to swallow its own tail. The form is caused by the presence or absence of zinc(II) in solution, which flips the cavity between open and closed states (see https://doi.org/10.1002/anie.200906753). Oroboros pictures of the month page