CUBANE-TYPE clusters containing the unit M4A4 have been the subject of many investigations. Several of these systems have been characterised by X-ray structure determination. Such clusters are important from a bioinorganic point of view, for example, Fe4S4 clusters in iron–sulphur proteins1. From a catalytic point of view, clustered compounds are becoming increasingly important as models for heterogeneous catalysts, and even as catalysts by themselves2. Monoatomic ligands (for example, A = S, Cl, P, Br, Se) have been reported as bridging ligands in cubane-type clusters, but larger groups are known in which C, N, and O act in a similar way3. No cubane-type clusters have been previously reported with the highly electronegative F− ion as a bridging ligand. We describe here the synthesis and structure of the first fluoro-bridged cubane-type cluster, having the formula [M4F4(L)12.] (BF4)4, in which M = Mn, Cd, Co and L = N-ethylimidazole or N-propylimidazole. On reaction of M(H2O)6 (BF4)2 in ethanol–triethyl orthoformate with an ethanolic solution of the ligand, finely-divided white powders (Mn, Cd) or purple crystals (Co) separate, analysing as M(ligand)3BF5. In these circumstances the F− ions are spontaneously generated by a slow decomposition of the BF4− ion. Such a decomposition of tetrafluoroborates, yielding fluoro complexes, has been reported in a few other cases, yielding polymeric fluoro-bridged systems4, dimers (M2F2)5 and also monomers MF2 (ligand)4 (ref. 6).
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Holm, R. H. Endeavour 34, 38–45 (1975).
Demitras, G. C. & Muetterties, E. L. J. Am. chem. Soc. 99, 2796–7 (1977).
Bertrand, J. A. & Eller, P. G. Progr. inorg. Chem. 21, 29–53 (1976).
Guichelaar, M. A., van Hest, J. A. M. & Reedijk, J. Inorg. nucl. Chem. Lett. 10, 999–1004 (1974).
Jansen, J. C. & van Koningsveld, H. Cryst. Struct. Commun. 5, 441–445 (1976).
Smit, S. & Groeneveld, W. L. Inorg. nucl. Chem. Lett. 11, 277–80 (1975).
Babel, D. Z. Anorg. Allg. Chem. 369, 117–30 (1969).
Clarke, P. J. & Milledge, M. J. Acta Crystallogr. B31, 1543–53 (1975).
de Jongh, L. J. & Block, R. Physica 79B, 568–93 (1975).
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JANSEN, J., VAN KONINGSVELD, H. & REEDIJK, J. The first cubane-type fluoro-bridged cluster. Nature 269, 318–319 (1977). https://doi.org/10.1038/269318a0
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