A One-Dimensional Coordination Polymer, BBDTA·InCl₄: Possible Spin-Peierls Transition with High Critical Temperature of 108 K

We have studied the crystal structure and magnetic properties of the organic radical cation salt, BBDTA·InCl4. This material formed a one-dimensional coordination polymer. Magnetic measurements indicated the spin-Peierls transition-like behavior at 108 K, which was higher than those typically observed for the other organic spin-Peierls materials. The structural aspects of the lattice distortion from X-ray diffraction measurements at 50 K have been discussed.