Carbon Extrusion/Cluster Contraction: Synthesis of the Fluorinated Cyano-closo-Undecaborate K2[3-NC-closo-B11F10]


  • Financial support by the Fonds der Chemischen Industrie (FCI) is gratefully acknowledged. The author thanks Prof. W. Frank for generous support and Mrs. E. Hammes, Mr. P. Roloff, Dr. G. J. Reiss, and Dr. P. Tommes for technical support.


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Releasing carbon: Deprotonation of the amino group of the [1-H2N-closo-CB11F11] anion results in a transformation of the carba-closo-dodecaborate cluster into a closo-undecaborate dianion. The rearrangement is accompanied by loss of a fluoride anion, and the C[BOND]N fragment is converted into a cyano ligand (see scheme).