Supramolecualr squares with Rh_2~(4+) corners

摘要

Six molecular squares were obtained by reacting the singly metal-metal-bonded complex [Rh_2(cis-DAniF)_2(CH_3CN_(eq))_4(CH_3CN_(ax))_2](BF_4)_2 (DAniF = N,N'-di-p-anisylformamidinate), and (Et_4N~+)_2(Carb~(2-)) where Carb~(2-) represents the dicarboxylate anion bicyclo[1.1.1]pentane-1,3-dicarboxylate, 1; tetrafluoroterephthalate, 2; 1,4-cubanedicarboxylate, 3; terephthalate, 4; fumarate, 5; trans-1,4-cyclohexanedicarboxylate, 6; these squares stack in the crystal forming square channels capable of accommodating solvent molecules and the NMR spectra are consistent with the presence of highly symmetrical structures even in solution.