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

A methoxy-functionalized isophthalic acid, 5-methoxy isophthalic acid (H 2 mia), was used a versatile linker for assembling six new metal(ii) compounds under hydrothermal conditions. The obtained products were [Cu 2 (μ 2 -mia) 2 (phen) 2 (H 2 O) 2 ]·2H 2 O (1), [Mn(μ 3 -mia)(phen)] n (2), [Co(μ 2 -mia)(2,2'-bipy)(H 2 O)] n · n H 2 O (3), [Co(μ 3 -mia)(μ 2 -4,4'-bipy)] n · n H 2 O (4), [Co(μ 3 -mia)(py) 2 ] n (5), and [Cd(μ 2 -mia)(py)(H 2 O) 2 ] n · n H 2 O (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 H 2 mia as a versatile dicarboxylate linker for assembling a diversity of functional metal-organic architectures with remarkable structural features and catalytic properties.