Abstract
The title polymer compound of rhodium(II) formamidinate with toluene as crystal solvents [Rh2(form)4(1,4-dib)]n·2n(toluene) (form- = N,N′-di-p-tolylformamidinate anion; 1,4-dib = 1,4-diisocyanobenzne) was isolated, and the crystal structure was determined by the single-crystal X-ray diffraction method at 123 K. It crystallizes in the orthorhombic space group P212121 with a = 11.5161(16)Å, b = 20.946(4)Å, c = 28.944(4)Å, V = 6981.7(16)Å3, Dx = 1.343 g/cm3, and Z = 4. The R1 [I > 2σ(I)] and wR2 (all data) values are 0.0441 and 0.0744, respectively, for all 16061 independent reflections. The Rh-Rh distance is 2.5702(5)Å and the axial Rh-C (dib) distances are 2.041(3) and 2.050(3)Å. The polymer chain with the alternated arrangement of rhodium(II) dimer and 1,4-dib extends along the c axis in the crystal, slightly tilting with respect to the axis.
