Tetranuclearity can be considered a common and representative class of high-nuclearity 3d-metal clusters showing interesting properties spanning from catalysis and magnetism to modelling biochemical reactions. Various coordination motifs have been described in the literature in which the M4 cores present cubane topologies. Cubane-like clusters, found in a variety of transition metal complexes, exhibit interesting magnetic exchange properties that, under certain circumstances, display characteristics of single molecule magnets (SMMs). A synthetic route has been developed to prepare number of tetranuclear mixed valent (CoII-CoIII) clusters of diethanolamine (H2dea) derivatives. The complexes with composition [Co4(R-dea)2(L-L)4].nS.nCl (R = H, �CH3 or �CH2CH2OH, L-L = 2,2'-bipyridine or 1,10-phenanthroline, S = solvent molecules) have been prepared and characterized using spectral and single crystal X-ray crystallographic techniques. X-ray studies confirm the presence of defect dicubane core in the cluster.   References:[1] C.J. Milios, A. Vinslava, W. Wernsdorfer, S. Moggach, S. Parsons, S.P. Perlepes, G. Christou, E.K. Brechin, J. Am. Chem. Soc. 129 (2007) 2754.[2] Z.A. Siddiqi, A. Siddique, M. Shahid, M. Khalid, P.K. Sharma, Anjuli, M. Ahmad, S. Kumar, Y. Lan, A.K. Powell, Dalton Trans. 42 ( 2013) 9513.

Synthesis and X-ray crystallographic characterization of tetranuclear cobalt clusters derived from amino alcohols

248th National Meeting (2014)

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