Two coordination polymers based on a new nickel fluoride cluster

Nickel 1,3,5-benzenetricarboxylate (trimesic acid, TMA) and nickel 5-sulfoisophthalate (SIPA) coordination polymers, containing a unique planar tetranickel cluster bridged by μ3-F, were synthesized hydrothermally and characterized by single crystal XRD. Ni2(TMA)(F)(H2O)4⋅2H2O [1] crystallizes in the triclinic space group P-1 with cell parameters at 293 K: a=7.7447(2)Å, b=8.6239(3)Å, c=10.6572(3)Å, α=101.01(1)°, β=92.29(1)°, γ=94.89(1)°, V=695.00(1)Å3, R1=0.0826. Ni2(SIPA)(F)(H2O)5⋅4H2O [2] crystallizes in the monoclinic space group C2/c with cell parameters at 293 K: a=20.6425(4)Å, b=11.1001(2)Å, c=18.1779(4)Å, β=114.67(1)°, V=3785.06(1)Å3, Dc=1.937gcm−3, R1=0.0533. The two-dimensional sheets of TMA are transformed into the one-dimensional chains of SIPA when a sulfonate group replaces a carboxylate group on otherwise similar ligands.