Our research group previously reported a two-dimensional cationic inorganic material (BING-5,Pb_3F_5NO_3) where nitrate resides in the interlamellar space and can be anion exchanged. Investigation ofthe possible exchange of nitrate for benzoate led to the discovery of a layered metal–organic framework,lead benzoate hydrate Pb(C_6H_5CO_2)_2(OH_2)?The compound crystallizes as colourless plates in themonoclinic space group P2_1/c.The two dimensional lead–oxygen layers contain bridging benzoateoxygen atoms, with bridging water molecules further supporting the layers. The benzoate molecules arepositioned perpendicular to the layers and form a hydrophobic bilayer region. The material shows basiccharacter when immersed in various solvents suggesting potential as a base catalyst.
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