Triphenylphosphine-supported synthesis of two-dimensional silver(I) complex with (1,3,4-thiadiazole-2,5-diyldithio)diacetic acid

<p>The reaction of dicarboxylate ligand, (1,3,4-thiadiazole-2,5-diyldithio)diacetic acid (H₂tdza) with silver(I) acetate and triphenylphosphine (PPh₃) facilitate the formation of complex [Ag₂(tdza)(PPh₃)₂]<i>_n</i> <b>(1)</b>. The complex was characterized by elemental analysis, FT-IR spectroscopy, ¹H-NMR, ¹³C-NMR and ³¹P-NMR spectroscopy, and single crystal X-ray diffraction. Structural analysis revealed that complex <b>1</b> has a 2D topologically promising architecture as a result from the formation of 26-membered cyclic ring. The tdza2⁻ ligand in <b>1</b> displays unprecedented µ₄-bridging mode which is also the first example for this ligand. The interdigitating arrangement and π-π stacking between 2D arrays stabilized the formation of complex <b>1</b>.</p