Coordination driven discrete metallopolygons and cages from unsymmetric bidentate ligands

Diastereoselectively self-sorted low-symmetry binuclear metallomacrocycle and trinuclear metallocage

“…The ligand L un was prepared by the condensation of nicotinic acid with excess m-phenylene diamine. It was characterized by various spectroscopic techniques, including 1 H NMR, 13 C NMR, 2D NMR and ESI-MS (Fig. S1-S6 †).…”

“…Dalton Transactions ating the solvent. The isolated complex 1 was characterized by various spectroscopic techniques including 1 H NMR, 13 C NMR, COSY, HSQC, NOESY, and single crystal XRD techniques (Fig. S8-S12, Table S1, Fig.…”

“…However, conformational changes in the build of 2 are proposed on the Cage 2 could be successfully isolated from the DMSO medium using the precipitation method by adding excess EtOAc. The isolated complex was characterized by various spectroscopic techniques including 1 H NMR, 13 C NMR, COSY, HSQC, and NOESY (Fig. S16-S20 †).…”

“…[1][2][3][4][5][6][7] However, the preparation of low-symmetry self-assembled coordination complexes is a recent development. [11][12][13][14][15][16] Low-symmetry complexes of the types (PdL′) m (L a ) x (L b ) y and Pd m (L a ) x (L b ) y can be achieved by combining a suitable palladium(II) component with two types of complementary ligands (L a and L b ). [14][15][16] Another approach to prepare low-symmetry complexes has been combining a metal component with one type of unsymmetrical ligand (L un ).…”

“…[14][15][16] Another approach to prepare low-symmetry complexes has been combining a metal component with one type of unsymmetrical ligand (L un ). [11][12][13] Unsymmetrical ligands may generate a isomeric mixture of complexes due to the random arrangement of the binding sites of the ligand strands around the metal centres. Thus, the preparation of self-assembled coordination complexes of Pd x L′ x L un…”