Unusual heterometallic ZnMg(COO)3 building blocks for the construction of a homochiral srs-type metal-organic framework

A new homochiral metal-organic framework [ZnMg(btc)(H2O)4](NO3) (1, btc = 1,3,5-benzenetricarboxylate) with unusual 3-connected heterometallic ZnMg(COO)3 building blocks has been solvothermally synthesized and structurally characterized with the aid of single crystal X-ray diffraction. Compound 1 crystallizes in a chiral space group and exhibits 3-connected srs structural topology. The results reveal the first srs-type metal-organic framework constructed from heterometallic building blocks.