Satoshi Kawata, Steven R. Breeze, Suning Wang, John E. Greedan and N. P. Raju
A covalently linked 2D CuII compound, [Cu(O2CCF3)2(3-pyOH)2] n 1 (3-pyOH = 3-hydroxypyridine), when dissolved in thf, undergoes conversion to a hydrogen-bond linked 2D CuII compound, [Cu(O2CCF3)2(3-pyOH)2(thf) 2] 2, which upon heating or standing at 23 °C for a few hours is converted back to compound 1 by losing the coordinated thf molecule; weak ferromagnetic interactions between CuII centres dominate in both compounds.