The First (Trisulfoxide)metal Complexes: Synthesis and Crystal Structures of the 1D Lanthanide Coordination Polymers [Ln(L)(MeOH)(NO3)3]n and {[La(L)(DMF)5](ClO4)3}n [L = 1,3,5‐Tris(ethylsulfinyl)‐2,4,6‐trimethylbenzene, Ln = LaIII and NdIII]

A new trisulfoxide ligand, 1,3,5‐tris(ethylsulfinyl)‐2,4,6‐trimethylbenzene (L), was designed and synthesized, and treated with Ln(NO3)3 or Ln(ClO4)3 to produce three coordination polymers: [Ln(L)(MeOH)(NO3)3]n [where Ln = LaIII (1); NdIII (2)] and {[La(L)(DMF)5](ClO4)3}n (3). Solid‐state structures of all three complexes were determined by single‐crystal X‐ray diffraction. The three complexes have 1D helical‐chain structures and complexes 1 and 2 are isostructural. To the best of our knowledge, these coordination polymers are the first examples of (trisulfoxide)metal complexes. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004)