The metal complexes (M=Cu, Ni, Pd, and Pt) formed the 2D sheet structure mediated by trifluoroacetic acid which provide hydrogen bonding interactions within the sheet as well as electrostatic interactions between the sheets. The SQUID measurement of the Cu complex reveals the χT value of 0.381emuKmol −1 at room temperature, which is close to the calculated value for uncorrelated S=1/2 spins. In the whole temperature range the χT value shows no dramatic changes, indicating the absence of strong magnetic interactions between the Cu complexes. The DFT calculation of the Cu complex supports the paramagnetic behavior.