
Zeitschrift fur Anorganische und Allgemeine Chemie p. 141 - 146 (1998)
Update date:2022-08-05
Topics:
Goeldner, Melanie
Kienast, Arne
Homborg, Heiner
Dirheniumheptoxide reacts with phthalodinitrile in boiling 1-chloronaphthalene and subsequent reprecipitation of the green raw product from cone, sulfuric acid to yield an oxo-phthalocyaninate of rhenium, which is reduced by molten triphenylphosphine forming dark green trans-bis(triphenylphosphine)phthalocyaninato(2-)rhenium(II), trans[Re(PPh3)2pc2-]. The latter crystallizes triclinic in the space group P1 with the cell parameters as follows: a = 11.512(2) A, b = 12.795(2) A, c = 12.858(2) A, α = 64.42(2)°, β = 79.45(2)°, γ = 72.74(1)°; V = 1628.1(5); Z = 1. Re is in the centre of the (Np)4 plane (Np: N1, N3) and coordinates two triphenylphosphine ligands axially in trans position. The average Re-Np and Re-P distances are 2.007(1) and 2.516(3) A, respectively. Despite the many extra bands the typical B, Q and N regions of the pc2- ligand are observed at ca. 16500, 28900/32900 and 35300cm-1. A weak band group at ca. 8900 cm-1 is attributed to a trip-multiplet transition, another one at ca. 14500 cm-1 to a P → Re charge transfer. The vibrational spectra are dominated by internal vibrations of the pc2- ligand. The very weak intensity of the IR bands at 905 and 1327 cm-1 are diagnostic of the presence of ReII.
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