An unprecedented interpenetrating structure with two covalently bonded open-frameworks of different dimensionality

A chemical rearrangement under hydrothermal conditions resulted in an unprecedented interpenetrating structure with two covalently bonded open frameworks of different dimensionality: {[Cu-2(IN)(4). 3H(2)O]. [Cu-2(IN)(4). 2H(2)O]}. 3H(2)O (IN = isonicotinate).