Spin Control in Ladderlike Hexanuclear Copper(II) Complexes with Metallacyclophane Cores
datasetposted on 03.05.2004 by Emilio Pardo, Kevin Bernot, Miguel Julve, Francesc Lloret, Joan Cano, Rafael Ruiz-García, Fernando S. Delgado, Catalina Ruiz-Pérez, Xavier Ottenwaelder, Yves Journaux
Datasets usually provide raw data for analysis. This raw data often comes in spreadsheet form, but can be any collection of data, on which analysis can be performed.
Two new hexanuclear oxamatocopper(II) complexes 3 and 4 have been synthesized from the binuclear copper(II) complexes of the meta- and para-phenylenebis(oxamate) ligands, respectively. Complexes 3 and 4 possess an overall ladderlike structure made up of two oxamate-bridged linear trinuclear units (“rails”) connected through two phenylenediamidate bridges (“rungs”) between the central copper atoms to give metallacyclic cores of the meta- and para-cyclophane type, respectively. They show different ground spin states, S = 1 (3) or S = 0 (4), depending on the substitution pattern in the aromatic spacers. The triplet state molecule 3 containing two spin doublet CuII3 units connected by two m-phenylenediamidate bridges represents a successful extension of the concept of “ferromagnetic coupling units” to metal complexes, which is a well-known approach toward high spin organic radicals.