Crystal structure of [AsPh4]2[{TcN(O2)2}2(ox)]·2Me2CO: an oxalate-bridged technetium(VII) nitridoperoxo dimer

Abstract

Recrystallisation of [AsPh₄]₂[{TcN(O₂)₂}₂(ox)]1(ox = oxalate (2–)] from acetone gives [AsPh₄]₂-[{TcN(O₂)₂}₂(ox)]·2Me₂CO 2. Complex 2 crystallises in the monoclinic space group C2/c with cell parameters a= 34.49(1), b= 14.684(3), c= 22.776(6)Å, β= 107.18(3)° and Z= 8. The structure refined to a final R= 0.092 and R′= 0.100 based on 2156 observed data. The structure is dimeric and consists of two TcN(O₂)₂ units bridged by a quadridentate sideways-bound oxalate. The geometry about each technetium atom is distorted pentagonal-bipyramidal with the nitrido ligand in an apical position.