Unprecedented layered coordination polymers of dithiolene group 10 metals: magnetic and electrical properties

Abstract

One-pot reactions between Ni(II), Pd(II) or Pt(II) salts and 3,6-dichloro-1,2-benzenedithiol (HSC₆H₂Cl₂SH) in KOH medium under argon lead to a series of bis-dithiolene coordination polymers. X-ray analysis shows the presence of a common square planar complex [M(SC₆H₂Cl₂S)₂]²⁻ linked to potassium cations forming either a two-dimensional coordination polymer network for {[K₂(μ-H₂O)₂(μ-thf)(thf)₂][M(SC₆H₂Cl₂S)₂]}_n [M = Ni (1) and Pd (2)] or a one-dimensional coordination polymer for {[K₂(μ-H₂O)₂(thf)₆][Pt(SC₆H₂Cl₂S)₂]}_n (3). In 3 the coordination environment of the potassium ions may slightly change leading to the two-dimensional coordination polymer {[K₂(μ-H₂O)(μ-thf)₂][Pt(SC₆H₂Cl₂S)₂]}_n (4) that crystallizes together with 3. The physical characterization of compounds 1–3 show similar trends, they are diamagnetic and behave as semiconductors.