Tetrabutylammonium bis(2-amidobenzenethiolato-k²S,N)oxorhenate(V)

Bu₄N[ReO(abt)₂] was obtained via the precursor Bu₄N[ReOCl₄], its conversion into an ethylene glycol complex as an intermediate and subsequent ligand exchange by H₂abt to form the tetrabutylammonium salt of the abt complex in 62 % yield. Elemental analysis, mass, NMR and IR spectra confirm the composition Bu₄N[ReO(abt)₂]. The crystal structure contains well separated ReO(NHC₆H4S)₂ anions and Bu₄N⁺ counter cations. The coordinationgeometry of Re is distorted square pyramidal, with an apical Re O bond length of 1.676(5)A°.The dihedral angle between the two benzene rings is 33.75(1)°. These values do not differ
much from those of the corresponding Tc compound.