Microporous Rhodium(II) 4,4′,4″,4″′-(21H,23H-porphine-5,10,15,20-tetrayl)tetrakisbenzoate. Synthesis, Nitrogen Adsorption Properties, and Catalytic Performance for Hydrogenation of Olefin

A novel microporous rhodium(II) coordination polymer, [Rh2(H2TCPP)] (1) (H2TCPP = 4,4′,4″,4″′-(21H,23H-porphine-5,10,15,20-tetrayl)tetrakis benzoic acid) was synthesized. The complex 1 showed high porosity of the micropores of 7.3 Å. The amount of nitrogen adsorbed by 1 was 2.87 mole per mole of Rh, which is about three times that of rhodium(II) fumarate and rhodium(II) terephthalate. Complex 1 also showed high turnover frequencies for the hydrogenation of ethylene and propene at ca. 200 K.