Chiral Carborane Based N,O-Ligands: First Co and Fe Complexes and their Properties

JOSÉ GINER PLANAS; FLORENCIA DI SALVO; MIN YING TSANG; FRANCESC TEIXIDOR; CLARA VIÑAS; MARK E. LIGHT; NURIA ALIAGA-ALCALDE

Valencia

Conferencia; International Conference on Coordination Chemistry; 2012

Universidad de Valencia

The coordination chemistry of the simple ligand 2-hydroxymethyl pyridine (hmpH) towards a wide range of transition metal ions has afforded a large family of structures with various interesting architectures and properties [1]. We have recently described the synthesis, molecular and supramolecular characterization of a series of new nitrogenated aromatic carboranyl alcohols (1 and 2a-c) [2]. These compounds, that are prepared in very good yields from one pot reactions, can be regarded as hmpH ligands where one of the H atoms at the CH2 position of the alcohol arm has been replaced by a carboranyl fragment. The success of this procedure has opened a new door toward the synthesis of very attractive, yet unexplored, carborane based transition metal complexes. The high thermal and chemical stability, hydrophobicity, acceptor character, ease of functionalization and three-dimensional nature of the icosahedral carborane clusters make these new molecules valuable ligands in coordination chemistry. In addition, the asymmetry and chiral nature of these ligands, together with their ability for establishing H-bonds, will provide intrinsic features to the final metal complexes allowing unique fingerprints. Herein, we report our initial studies on the metallosupramolecular chemistry of these yet unexplored class of carborane-based chiral N,O ligands, which includes the synthetic procedure, structures, chlathrating and magnetic properties of new cobalt and iron complexes. [1] T. Taguchi, W. Wernsdorfer, K. A. Abboud, G. Christou, Inorg. Chem. 2010, 49, 10579 and references there in. [2] F. Di Salvo, J.G. Planas, B. Camargo, Y. Garcia, F. Teixidor, C. Viñas, M.E. Light, M. B. Hursthouse, CrystEngComm, 2011, 13, 5788.