Molecular tectonics: generation of grid and porous diamondoid coordination networks by calixarene based tectons†
Combinations of neutral tetrakis meta-pyridyl appended calixarene derivatives in 1,3-A conformation as tectons 3 (tetrakis-meta-pyridyl-tetrathiacalixarene) and 4 (tetrakis-meta-pyridyltetrathiatetramercaptocalixarene) with MX2, behaving as a neutral metallatecton, lead to the formation of 2- and 3-D neutral coordination networks. In all cases, the metal centre adopts a distorted octahedral geometry with the two anions occupying the two apical positions. For compound 3-CdX2 (X = Cl or Br), 4-CdBr2 and 4-FeCl2 similar porous diamondoid 3D networks, resulting from the tetrakis monodentate behaviour of the organic tectons, are formed. In marked contrast, for 4-CoX2 (X = Cl or Br), only two out of the four pyridyl units take part in the connectivity pattern leading thus to the formation of 2D grid type architectures.
- This article is part of the themed collection: Structural Macrocyclic Supramolecular Chemistry