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Synthesis and structure of triarylantimony dioximates

“…Similarly we obtained triphenylantimony bis-(cyclohexanone oximate) (III), 67%, mp 124oC (116oC [4]); triphenylantimony bis(benzophenone oximate) (IV), 82%, mp 118oC (117oC [5]); and tri-ptolylantimony bis(acetophenone oximate) (V), 91%, mp 125oC (126oC [8]). …”

“…The presence of an intramolecular Sb...N contact in compounds I and II does not significantly affect the equatorial angles which only slightly differ from the theoretical value of 120o, unlike what is observed in triarylantimony dicarboxylates, where intramolecular Sb...O=C contacts much increase one of the equatorial angles (143.83151.7o) [22328]. Bidentate ligation of the oximate ligand was observed in all previously structurally characterized tri-and tetraarylantimony oximates [5,7,8,15,19].…”

“…If the reactions were carried out at room temperature or under short heating, tetraarylantimony oximates formed in yields of up to 93% [19].…”

“…We have been the first to synthesize triarylammonium dioximates by an oxidative addition procedure based on the reaction of triarylantimony with hydrogen peroxide in the presence of an oxime at a 1 : 1 : 2 molar reagent ratio [5]. Ar 3 Sb + H 2 O 2 + 2HON=CRR7 6 Ar 3 Sb(ON=CRR`) 2 + 2H 2 O.…”

Synthesis and structure of bis-μ-[(methylenedicyclopentanone-2,2′-dioximato)triphenylantimony]

“…It is known that the reaction of pentaarylantimony with mono-or polyfunctional oximes taken in equimolar amounts in aromatic solvent affords tetraarylantimony oximates [1][2][3]. The second aryl group was shown to be detached also from the antimony atom under rigid conditions ( 90-100° C , 1-5 h).…”