Abstract
Two new complexes, based on the unit Ru2Cl(μ-O2CC4H4N)4 (1) (O2CC4H4N = pyrrole-2-carboxylate), Ru2Cl(μ-O2CC4H4N)4(H2O)·4H2O [1(H 2 O)·4H 2 O], and Ru2Cl(μ-O2CC4H4N)4(Me2CO) [1(Me 2 CO)], are synthesized and structurally characterized. The physical properties of these complexes are studied and compared with those previously reported for Ru2Cl(μ-O2CC4H4N)4(thf)·thf·H2O [1(thf)·thf·H 2 O]. The nature of the solvent molecule bonded to the axial position of the dimetallic unit determines the supramolecular interactions leading to different arrangements in the solid state. The presence of NH groups in the pyrrolic rings favours the existence of hydrogen bond interactions that are present in the three complexes. In addition, complex 1(Me 2 CO) shows π–π stacking interactions through pyrrolic rings of different dimetallic units.
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Acknowledgments
We are grateful to M.E.C., C.A.M, and U.C.M (projects no. CTQ2005-00397, S-0505-MAT-0303, and UCM-921073) for financial support. R.G. wishes to acknowledge the Spanish M.E.C. for his “Juan de la Cierva” position.
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Dedicated to the memory of Prof. F. Albert Cotton.
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Barral, M.C., González-Prieto, R., Herrero, S. et al. Self-Assembly of Supramolecular Architectures Using Chlorotetra(Pyrrole-2-Carboxylato)Diruthenium Molecules as Building Blocks. J Clust Sci 19, 219–230 (2008). https://doi.org/10.1007/s10876-007-0163-4
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DOI: https://doi.org/10.1007/s10876-007-0163-4