Multiply bridged organodiantimony(V) compounds; crystal structures of [(SbR2)2(μ-O)2(μ -O2AsMe2)2] (R = Ph or p-tolyl) and [(SbR3)2(μ-O)(μ-O2 MR′2)2] (R = Ph, M = P, R′ = Me; R = Ph, M = As, R′ = Me or Ph; R = p-tolyl, M = P, R′ = Me)

Abstract

A number of quadruply and triply bridged organodiantimony(V) compounds have been synthesized by reactions of [(SbR 2 BrO) 2 ] (R = Ph or p-tolyl) and [(SbR 3 X) 2 O] (R = Ph or p-tolyl, X = Br or Cl) with Na(O 2 AsMe 2 ), Na(O 2 AsPh 2 ) or Na(O 2 AsMe 2 ). The compounds have been characterised by a range of spectroscopic methods and crystal structures are reported for two quadruply bridged, [(SbPh 2 ) 2 (µ-O) 2 (µ -O 2 AsMe 2 ) 2 ] and [{Sb(p-MeC 6 H 4 ) 2 } 2 (µ-O) 2 (µ-O 2 AsMe 2 ) 2 ], and four triply bridged compounds, [(SbPh 3 ) 2 (µ-O)(µ-O 2 PMe 2 ) 2 ], [(SbPh 3 ) 2 (µ-O)(µ-O 2 AsMe 2 ) 2 ], [(SbPh 3 ) 2 (µ-O)(µ-O 2 AsPh 2 ) 2 ] and [{Sb(p-MeC 6 H 4 ) 3 } 2 (µ-O)(µ-O 2 PMe 2 ) 2 ]. Related trimethylantimony(V) compounds, i.e. [{SbMe 3 (O 2 PMe 2 )} 2 O] and [{SbMe 3 (O 2 AsPh 2 )} 2 O], which are highly moisture sensitive, have also been obtained.