Self‐Assembly of Discrete Copper(I)‐Halide Complexes with Diacylthioureas

Abstract

Three diacylthioureas 1,4‐C6H4[C(O)NHC(S)NHAr]2 (Ar = 2,6‐iPr2C6H3) (L1, 1), 1,3‐C6H4[C(O)NHC(S)NHAr]2 (L2, 2), and 1,3‐C6H4[C(O)NHC(S)NHAr′]2 (Ar′ = 2,6‐Me2C6H3) (L3, 3) were synthesized and characterized. The CuI complexes from the reactions of bipodal ligands Ln with CuX (X = Cl, Br, I) were structurally investigated by single‐crystal X‐ray diffraction methods. Treatment of L1 with CuX gave the metallamacrocyclic complexes (L1CuX)2 [X = Cl (4), Br (5), I (6)] with the ligand to metal in a ratio of 2:2, where both sulfur and halide anions function as terminal substituents. In contrast, when L2 or L3 was reacted with CuBr, the two Ln ligands coordinate to four copper atoms each in a bridging and terminal fashion to yield [Ln(CuBr)2]2 [n = 2 (7), 3 (8)]. The obtained S4Cu4Br4 core contains all four bromide anions in bridging positions. The reaction of L3 with CuX (X = Cl, I) gave the 3:3 trinuclear complexes (L3CuX)3 [X = Cl (9) I (10)], interconnected by halide bridges. The obtained diacylthioureas (1–3) and their CuI complexes (4–10) were also characterized by elemental analysis, FT‐IR, 1H and 13C NMR spectroscopy.