The title compound,Cd5（BTC）4(H2O)8·6H2O（BTC=1,3,5-benzenetricarboxylate） was synthesized under mild conditions,and its crystal structure was determined by means of single crystal X-ray diffraction.The compound crystallizes in the monoclinic system and belongs to space group P21/c with a=1.022 6（2） nm, b=1.081 4（2） nm,c=2.987 6（6） nm,β=99.437（3） °,V=3.259 1（11） nm3,Z=2,Dc=1.645 g/cm3,Mr=807.23,μ=1.691 mm-1,F（000）=1 544,GOF=1.082,R=0.059 2,wR=0.187 7. Its structure revealed that Cd1 and Cd2 centers are firstly linked with BTC to form wave-like layers,and then the octahedral coordination geometries of Cd3 centers connect the neighboring above layers to construct the 3D framework of Cd5（BTC）4（H2O）8·6H2O having 'Z'-like shaped channels with the greatest dimensions about 2.6 nm viewed along the direction.
A new metal-organic polymer Mn3（BTC）2(H2O)9·(H2O) was synthesized by reaction of the metal ions Mn（Ⅱ） with 1,3,5-benzenetricarboxylic acid(H3BTC) in a mixed solution of DMF/C2H5OH/(H2O) and crystallized.The crystal belongs to monoclinic system,space group C2/c with a=1.901 4（4） nm,b=0.740 23（15） nm,c=2.044 9（4） nm,β=97.18（3）°,V=2.855 5（10） nm3,Z=4,Dc=1.766（g/cm3）,μ（Mo Kα）=1.401 mm-1,R[I>2σ（I）]=0.072 7,wR=0.235 1 for 2 419 independent reflections with goodness-of-fit 1.046. Its structure possesses bilayer architectures constructed from Mn ions linked infinite Mn（BTC） chains which were build up from BTC ligand as the "T-shape" module and Mn as the linear module.The hydrogen-bond and π-π stacking interactions between bilayers make them three-dimensional channel-like interpenetrated frameworks.
