STRUCTURAL INTERCONVERSION FACILITATED BY A BIFUNCTIONAL LIGAND - A COVALENTLY-LINKED 2D CU-II SHEET [CU(3-PYOH)(2)(O2CCF3)(2)](N) AND A HYDROGEN-BOND LINKED 2D CU-II SHEET [CU(3-PYOH(2))(O2CCF3)(2)(THF)(2)](N)

A covalently linked 2D Cu-II compound, [Cu(O2CCF3)(2)(3-pyOH)(2)](n) 1 (3-pyOH = 3-hydroxypyridine), when dissolved in thf, undergoes conver sion to a hydrogen-bond linked 2D Cu-II compound, [Cu(O2CCF3)(2)(3-pyO H)(2)(thf)(2)] 2, which upon heating or standing at 23 degrees C fora few hours is converted back to compound 1 by losing the coordinated th f molecule; weak ferromagnetic interactions between Cu-II centres domi nate in both compounds.