Six metal-organic architectures from a 5-methoxyisophthalate linker: assembly, structural variety and catalytic features.

A methoxy-functionalized isophthalic acid, 5-methoxy isophthalic acid (Hmia), was used a versatile linker for assembling six new metal(ii) compounds under hydrothermal conditions. The obtained products were [Cu(μ-mia)(phen)(HO)]·2HO (1), [Mn(μ-mia)(phen)] (2), [Co(μ-mia)(2,2'-bipy)(HO)]·HO (3), [Co(μ-mia)(μ-4,4'-bipy)]·HO (4), [Co(μ-mia)(py)] (5), and [Cd(μ-mia)(py)(HO)]·HO (6), where phen(1,10-phenanthroline), 2,2'-bipy(2,2'-bipyridine), 4,4'-bipy(4,4'-bipyridine) or py(pyridine) were incorporated as auxiliary ligands. The crystal structures of 1-6 range from 0D (1) and 1D (2, 3, 5, 6) CPs to a 2D network (4) with a variety of topological types. The catalytic behavior of 1-6 was studied in the cyanosilylation reaction between trimethylsilyl cyanide and aldehydes, resulting in up to 99% yields of products under optimized conditions. Various reaction parameters as well as catalyst recycling and substrate scope were investigated. This study widens the use of Hmia as a versatile dicarboxylate linker for assembling a diversity of functional metal-organic architectures with remarkable structural features and catalytic properties.