Syntheses and structures of tetraphenylantimony oximates: Ph4SbON=CHR (R = C6H4Br-2, C6H4NO2-2, C4H3S)

Abstract

The reactions of pentaphenylantimony with oximes or triphenylantimony dioximates in toluene afford tetraphenylantimony oximates Ph₄SbON=CHR (R = C₆H₄Br-2 (I), C₆H₄NO₂-2 (II), and C₄H₃S-2 (III)). Triphenylantimony dioximates are synthesized by oxidative addition from triphenylantimony and oxime in diethyl ether in the presence of tert-butyl hydroperoxide. According to the X-ray diffraction data (CIF files CCDC no. 1055414 (I), 1055634 (II), and 1061727 (III)), the coordination mode of the antimony atoms in the molecules of compounds I–III is a distorted trigonal bipyramid with the oxygen atom of the oximate ligand in the axial position. The structural organization of the crystals is caused by weak hydrogen bonds.