Citation: Fondo, Matilde; Doejo, Jes\'us; Garc\'ia-Deibe, Ana M.; Sanmart\'in-Matalobos, Jes\'us; Vicente, Ram\'on (2016). A Ni8metallacalix[4]arene and a Cu4molecular rhomboid: limiting the nuclearity of carboxysalen-like metal complexes. CrystEngComm, 18, pp. 6673-.