The reactions of trifluoromethyl and pentafluorophenyl cyanides with BCl3, BBr3, TiCl4, and SnCl4 have been investigated and the compounds [TiCl4(C6F5·CN)2], [BX3(C6F5·CN)], and {CF3·C(X)![[double bond, length half m-dash]](https://www.rsc.org/images/entities/char_e006.gif)
NBX2}2(X = Cl or Br) are described. The ethylideneamino-boranes were produced by the novel insertion of a cyano-group into a boron–halogen bond. 11B- and 19F-Nuclear magnetic resonance and infrared spectral data are recorded.
J. Chatt, R. L. Richards and D. J. Newman, J. Chem. Soc. A, 1968, 126 DOI: 10.1039/J19680000126
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