New catecholate complexes of triphenylantimony(V) based on 6-iminomethyl-3,5-di-tert-butylpyrocatechols N-functionalized by the aniline or phenol group

The following new triphenylantimony(V) catecholate complexes bearing the protonated imine group are synthesized from the new sterically hindered 3,5-di-tert-butylpyrocatechols (6-(CH=N-o-(C6H4–NH2))-3,5-Cat)H2 (H2L1) and (6-(CH=N-o-(C6H4–OH))-3,5-Cat)H2 (H2L2) containing in position 6 the iminomethyl group bonded to the aniline or phenol substituent: (6-(CH=NH+-o-(C6H4–NH2))-3,5-Cat)SbPh3X (X = Br (I), OMe (III)) and (6-(CH=NH+-o-(C6H4–OH))-3,5-Cat)SbPh3X (X = Br (II), OMe (IV)). The molecular structure of complex III · CH 3 OH in the crystalline state is determined by X-ray diffraction analysis (CIF file CCDC no. 1554694). The electrochemical properties of complexes III and IV are studied by cyclic voltammetry.