Lewis acidity enhancement of triarylborane by appended phosphine oxide groups.

  title={Lewis acidity enhancement of triarylborane by appended phosphine oxide groups.},
  author={Jaewoo Kwak and Nguyen Van Nghia and Junseong Lee and Hyoseok Kim and Myung-Hwan Park and Min Hyung Lee},
  journal={Dalton transactions},
  volume={44 10},
A series of mono-, di-, and tri-phosphine oxide substituted triarylboranes, Mes2BAr (1), MesBAr2 (2), and BAr3 (3) (Ar = 4-(Ph2PO)-2,6-Me2-C6H2) were prepared to investigate the effect of a phosphine oxide group (Ph2PO) on Lewis acidity enhancement of triarylboranes. The X-ray crystal structure of 3 revealed peripheral decoration of Ph2PO groups with a C3-axis perpendicular to the trigonal boron center. UV/Vis absorption and PL spectra indicated a significant contribution of π(Mes or phenylene… 
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