Fig. 2. ORTEP plots of the PyrDTC^–, ImDTC^– and DIDTC^– anions determined as the potassium salts. Top left: X-ray structure of the pyrrolyl-dithiocarbamate anion (PyrDTC^–, 4). The C1–N1 bond length is 1.406 Å (avg.), and the S1–C1–S2 bond angle is 123.6° (avg.). Top right: X-ray structure of the imidazolidyldithiocarbamate anion (ImDTC^–, 5): selected bond lengths are C1–N1, 1.413 Å (avg.) and the S1–C1–S2 bond angle is 125.6° (avg.)°. Bottom: X-ray structure of the diisopropyldithiocarbamate anion (DIDTC^–). The C1–N1 bond length is 1.344(5) Å and the S1–C1–S2 bond angle is 117.3(2)°. (Each structure shown with 50% thermal ellipsoids. For 4 and 5, two DTC^– anions appear in the asymmetric units, so the above bond angles and lengths are averaged. Packing and asymmetric unit structures are shown in ESI Fig. S1–S3,† while the crystal and structural refinement data and bond lengths and angles are reported in ESI Tables S1–S6†).