Di-n-butyltin dichloride (nBu 2 SnCl 2 ) was treated with the potassium salt of cis-1,4-cyclohexanedicarboxylate (cis-1,4-chdcaK 2 ) to give di-n-butyltin cis-1,4-cyclohexanedicarboxylate. In the solid state two supramolecular isomers coexist within the same crystal lattice, the 36-membered macrocyclic tetranuclear complex [{nBu 2 Sn(cis-1,4-chdca)} 4 ] and the analogous polymeric form [{nBu 2 Sn(cis-1,4-chdca)} n ]. In solution, fast (on the NMR time scale) dynamic equilibria were detected. The supramolecular arrangement in the solid state consists of alternating macrocycle and polymer ribbons with

Di- and trinuclear organotin(IV) complexes, in which the metal atoms are separated by large aromatic connectors, are useful building blocks for self-assembly. This is demonstrated by the preparation of [1+1], [2+2], and [2+3] macrocyclic and cage-type structures in combination with organic aromatic dicarboxylates. The linkage of the metal atoms by organic binders and the option of varying the number of reactive M-X sites generate versatile building blocks enabling molecular tectonics instead of the node-based strategy generally employed in metallo-supramolecular self-assembly.

The combination of two heteroaromatic boronic acids with pentaerythritol gave self-complementary tectons which were suitable for the generation of 2D and 3D molecular networks.

Abstract1,10‐Diaza‐18‐crown‐6 and 4,4′‐trimethylenedipiperidine were transformed into bis‐dithiocarbamate ligands, which were then reacted in situ with different di‐ and triorganotin(IV) chlorides to generate dinuclear monomeric or macrocyclic products. The identity of the compounds was established by elemental analysis, multinuclear NMR spectroscopy (1H, 13C, and 119Sn), IR spectroscopy, mass spectrometry, and for representative examples additionally by single‐crystal X‐ray diffraction analysis. In combination with DFT calculations, the structural characterization showed that diaryltin and dialkyltin fragments give macrocycles of different conformation owing to changes in the coordination stereochemistry (cis vs. trans isomers). The macrocycle cavities are suitable for the inclusion of guest molecules. At the supramolecular level, the Sn complex molecules are linked through intermolecular C–H···S and C–H···Cl interactions in the solid state.

This contribution describes metal-organic frameworks based on cadmium-clusters that are capable of generating doublepillared architectures. A brief overview of the literature concerning such systems is presented together with the description of three new coordination polymers, [{[Cd 2 (trans-1,2-a,achdc)(trans-1,2-e,e-chdcH) 2 (4,4Ј-bpy) 2 ]·8H 2 O} n ] (1), [{Cd 2 -(trans-1,4-e,e-chdc)(trans-1,4-a,a-chdc)(4,4Ј-bpe) 2 } n ] (2)