Reactions of oximes halides. Part III. α-benzil monoxime and acetyl monoxime with phenyl boron dichloride and boron tri-fluoride, -chloride and -bromide
✍ Scribed by S. Ahmad; K.M. Ali; J. Charalambous; M.J. Frazer
- Book ID
- 104137639
- Publisher
- Elsevier Science
- Year
- 1978
- Tongue
- English
- Weight
- 707 KB
- Volume
- 31
- Category
- Article
- ISSN
- 0020-1693
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✦ Synopsis
Reaction of boron trifluoride with a-be&l monoxime (bmoH) gave BF,, bmoH. With boron trichloride and tribromide the oxime gave BXJbmo) (X = Cl or Br) and with phenyl boron dichloride it gave PhBCl(bmo). Analogous complexes were obtained from acetyl monoxime (amoH). The complexes BX,(bmo) were unaffected by water but were hydrolysed by warm alkali; all the other complexes were hydrolysed by water. The adduct BF,, bmoH underwent Beckmann fragmentation on heating at 120 "C/O.1 mm but at 120'/760 mm the adduct underwent Beckmann rearrangement; the other complexes underwent Beckmann fragmentation on heating. Mass spectrometric studies indicate that the complexes BC&(bmo) and BXz(amo) are dimeric in the vapour state.