A Flexible Tri‐carboxylic Acid Derived Zinc(II) 3D Helical Metal‐Organic‐Framework and a Cadmium(II) Interwoven 2D Layered Framework Solid

Starting from a flexible tri‐carboxylic acid ligand H 3 L {H 3 L = 2,4,6‐tris[(4′‐carboxyphenoxy)methyl]‐1,3,5‐trimethylbenzene}, a 3D metal‐organic framework [Zn(HL)(H 2 O)] n ( 1 ) and a 2D polymeric layered solid {[(CH 3 ) 2 NH 2 )] 2 [Cd 2 L 2 (DMA) 2 ]} n ( 2 ) were hydrothermally synthesized. The complexes were characterized by elemental analyses, FT‐IR spectroscopy, TGA, and single‐crystal X‐ray diffraction. The X‐ray structural analyses reveal that the complex 1 is an example of a doubly interpenetrated 3D helical MOF with mutually entwined right‐ and left‐handed helices to form an overall racemic framework. Complex 2 is made up of fourfold interwoven 2D nets in the solid state.