Imine chloroboration: reaction of boron trichloride with a bulky diazadiene gives not a diazaborolium salt, but a 2,4,5 trichloro-1,3,2-diazaborolidineElectronic supplementary information (ESI) available: Experimental details and characterisation data for 1. See http://www.rsc.org/suppdata/cc/b1/b101580j/

Abstract

Reaction of N,N′-bis(2,6-diisopropylphenyl)-1,4-diazadiene with BCl₃ in hexane gave the crystalline product of double chloroboration, N,N′-bis(2,6-diisopropylphenyl)2,4,5-trichloro-1,3,2-diazab orolidine, which was characterised by single crystal X-ray diffraction, microanalysis and multinuclear NMR spectroscopy.