Anion interaction with homoditopic chlorodiorganotin(IV) dithiocarbamate complexes derived from a naphthalene diimide. A pathway to obtain metallomacrocycles

A Structural Survey of Poly-Functional Dithiocarbamate Ligands and the Aggregation Patterns They Sustain

“…Such perplexing coordination flexibility has been long recognised [91], especially as mono-nuclear diphenyltin bis(dithiocarbamate) molecules which are known to adopt both skew-trapezoidal bipyramidal and octahedral geometries in a ratio of 1:2, and therefore, the study of their structural characteristics continues to attract attention [92]. Despite having a different general formula to the preceding class of compounds, molecules of composition (R2SnX)2(S2CN-spacer-NCS2) adopt very similar structural motifs in their crystals: (Me2SnCl)2(L 1 ) in the crystal of 67 [68] Figure 16b, and 72 are generated by 2-fold symmetry, whereas compounds 69, 70, and 73, as shown in Figure 16c, and 76 are disposed about a centre of inversion; molecules related to 73 attract interest as sensors for anions [71]. In each of 77, as shown in Figure 16d, and 78, where the tin-bound R groups are disparate and one pair of tin-bound R groups is connected, the molecules lack symmetry.…”

“…However, by contrast to the (R 2 Sn) 2 (S 2 CNspacer-NCS 2 ) 2 molecules in crystals 51-66, there is a significant diversity of symmetry in the 12 di-nuclear (R 2 SnX) 2 (S 2 CN-spacer-NCS 2 ) compounds: four have no crystallographically imposed symmetry, that is, 67, Figure 16a, 71, 74, and 75. Compounds 68, as shown in Figure 16b, and 72 are generated by 2-fold symmetry, whereas compounds 69, 70, and 73, as shown in Figure 16c, and 76 are disposed about a centre of inversion; molecules related to 73 attract interest as sensors for anions [71]. In each of 77, as shown in Figure 16d, and 78, where the tin-bound R groups are disparate and one pair of tin-bound R groups is connected, the molecules lack symmetry.…”