Multidentate, V‐Shaped Pyridine Building Blocks as Tectons for Crystal Engineering

Abstract

The formation of supramolecular structural units through self‐assembly is a powerful method to design new architectures and materials endowed with specific properties. With the aim of adding a group of versatile tectons to the toolkit of crystal engineers, we have devised and synthesised four new V‐shaped building blocks characterised by an aryl acetylene scaffold comprising three substituted pyridine rings connected by two triple bonds. The judicious choice of different substituents on the pyridine rings provides these tectons with distinctive steric, electrostatic and self‐assembly properties, which influence their crystal structures and their ability to form co‐crystals. Co‐crystals of the tectons with tetraiododifluorobenzene were obtained both via traditional and mechanochemical crystallisation strategies, proving their potential use in crystal engineering. The energetic contributions of the supramolecular interactions at play in the crystal lattice have also been evaluated to better understand their nature and strength and to rationalise their role in designing molecular crystals.

Fumarato and phthalato bridged dinuclear metal–organic Cu(ii) and Mn(ii) compounds involving infinite fumarate–water assemblies and unusual structure-guiding H-bonded synthons: antiproliferative evaluation and theoretical studies

“…, have emerged as exciting research areas of chemistry. 21,22 H-bonding interactions are the most commonly observed supramolecular synthons in crystal engineering; 23 however, structure guiding H-bonded synthons involving uncoordinated fum moieties are yet to be explored in coordination chemistry. Recently explored and less recognized unusual interactions viz.…”