Synthesis, Structure and Spectral Study of Two Types of Novel Fluorescent BF2 Complexes with Heterocyclic 1,3‐Enaminoketone Ligands.

Abstract Two types of novel BF 2 complexes are readily obtained by the reaction of BF 3 OEt with 3-(2-oxo-2-arylethylidene)-3,4-dihydro-1 H -quinoxalin-2-ones or 3-(2-oxo-2-arylethylidene)-3,4-dihydrobenzo[1,4]oxazin-2-ones, respectively in refluxing acetic acid/toluene solvent mixture. The complexes are confirmed by elemental analysis, FT-IR, 1 H, 13 C, 11 B, 19 F NMR and one of them is executed its X-ray crystallographic study. The outstanding photophysical properties of these complexes are determined by UV–vis absorption and fluorescence emission spectroscopy.