Synthesis, NMR and X-Ray Diffraction Analysis of Boron Complexes Derived from Hydroxychalcones

The synthesis of a series of "push-pull" boron complexes obtained by reaction of hydroxychalcones with borontrifluoride ether- ate and diphenylboronic acid is described. These derivatives have potential application in non-linear optics, since they present a conju- gated π system, a boron atom which can act as acceptor and a donor substituent at the para position.