A MnII5 tetragonal pyramid stabilized by p-tert-butylcalix[8]arene: Synthesis, structure and magnetic property

► A tetragonal pyramid-like MnII5 cluster was obtained with p-tert-butylcalix[8]arene. ► The calix[8]arene molecule adopts a 'pleated-loop' conformation. ► The MnII centers of the Mn5 cluster exhibit antiferromagnetic interactions.