BARC/PUB/10//0110

  
 

Binuclear rhodium(III) and iridium(III) monoselenocarboxylates: Synthesis, spectroscopy and structure of an ortho-metallated iridium complex featuring an IrCCC(µ-Se) chelate ring

  
     
 
Author(s)

Kumbhare, L. B.; Wadawale, A. P.; Jain, V. K.; Sieger, M.; Kaim, W.

ABSTRACT

Monoselenocarboxylate-bridged binuclear complexes of RhIII and IrIII, [(Cp*MCl)2(µ-SeCOAr)2] (1) (M = Rh or Ir.; Cp* = pentamethylcyclopentadienyl; Ar = Ph, C6H4Me-4), have been isolated either by the reaction between [Cp*2M2(µ-Cl)2Cl2] with KSeCOAr in acetonitrile or by treatment of [Cp*MCl(solvent)2][PF6] with KSeCOAr in acetone. The novel binuclear complexes, [Cp*IrCl(µ-SeCOAr)(k2-SeCOC6H3R-)IrCp*]2 (R = H or Me-4) with ortho-metallation at one of the iridium centres have been isolated following the use of excess AgPF6. The single crystal structure of [Cp*IrCl(µSeCOC6H5)(k2-SeCOC6H4-)]rCp*] (2a) exhibits two phenylcarboselenolate moieties situated in syn fashion with respect to the Ir2Se2 plane, one of which leans towards the metal centre in order to undergo ortho-metallation after iridium-chlorine bond dissociation.

 
 
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