Magnetic susceptibility of (N${\mathrm{H}}_3$C${\mathrm{H}}_2$C${\mathrm{H}}_2$N${\mathrm{H}}_3$)Cu${\mathrm{Cl}}_4$: A layered structure with strong interlayer magnetic coupling

The magnetic susceptibility of single-crystal (N${\mathrm{H}}_3$C${\mathrm{H}}_2$C${\mathrm{H}}_2$N${\mathrm{H}}_3$)Cu${\mathrm{Cl}}_4$ has been investigated between 4 and 300°K and this compound was found to be a three dimensional antiferromagnet with a nearest-neighbor exchange of $\frac{J}{k}=23.0\mathrm{}\pm 0.5°$ K and a next-nearest-neighbor exchange of $\frac{J^{\prime }}{k}=-13.7\mathrm{}\pm 0.5°$ K. The transition to long-range order occurs at 31.5±0.1°K. The structure of (N${\mathrm{H}}_3$C${\mathrm{H}}_2$C${\mathrm{H}}_2$N${\mathrm{H}}_3$)Cu${\mathrm{Cl}}_4$ is similar to that of other compounds which exhibit a square-planar nature and comparisons to these compounds are made.