269082-90-8Relevant articles and documents
The reaction of nitro-1,2-diaminobenzenes with the [ReO]3+ core: Isolation of oxo-free rhenium(V) complexes
Bandoli, Giuliano,Dolmella, Alessandro,Gerber, Thomas I.A.,Perils, Joanne,Du Preez, Jan G.H.
, p. 24 - 29 (2000)
The reaction of 2 equiv. of 3-nitro-1,2-diaminobenzene (H2L1) with trans-ReOCl3(PPh3)2 in ethanol gave the oxo-free rhenium(V) complex [ReCl(PPh3)(L1)2] (1) in good yield. IR, 1H NMR and X-ray crystallographic results indicate that the diamine ligand L1 coordinates in a dianionic bidentate diamido form to the metal, and that the complex has the unusual skew-trapezoidal bipyramidal geometry. With 4-nitro-1,2-diaminobenzene (H2L2) as ligand the complex [Re(L2)Cl3(PPh3)2] (2) was characterized, in which L2 coordinates in a dianionic monodentate imido form through one nitrogen only. Crystal data for 1·EtOH: C32H31ClN6O5PRe, monoclinic P21/c, a = 14.937(11), b = 15.017(8), c = 15.394(12) A?, β = 112.12(6)°, V = 3198.7(38) A?3, Z = 4, D(calc) = 1.728 g cm-3, structure solution and refinement based on 3151 reflections converged at R = 0.0807. (C) 2000 Elsevier Science S.A.