Study of Bis [N, N1‐Dicyclopropyldithiooxamidato (‐1)‐S,S'] Palladium(II) by X Ray Diffraction, UV‐VIS and IR Spectroscopy

Pd C16 H22 N4S4, Mr=505.0, monoclinic, P/c, Z=4, a=14.880(8), b=8.100(5), c=17.876(6) A, B=110.50(4)A at 150 K, V=2018(3)A3, Dx=1.66 Mg m−3, λ(MoK)=0.7107 A, μ=1.306 mm−1, crystal size 0.1×0.1×0.2 cm., F(000)=1024, Rw=0.10 for 2178 reflections with I>2σ(I) out of 3568 independent measurements. The structure contains two crystallographically independent Pd atoms situated at inversion centers. Each Pd is surrounded by four S atoms in a square-planar coordination. The distribution of bond lengths in the organic ligands suggests ionized thiolimid forms with extensive-electron delocalization over the entire carbon-nitrogen skeleton. The UV-Vis spectrum of the PdL2 (L=C3H5NCSCSNHC3H5) is compared with the spectra of related complexes and the absorption bands are assigned. An IR vibrational analysis is given for the complex in the solid state and in solution.