Deconvolution of supramolecular tectons and analysis of the structural role of the anions for two “wheel-and-axle” silver complexes

Abstract

The two complexes [Ag(LOH) 2 ]BF 4 and [Ag(LOH) 2 ]PF 6 are synthesised by reacting a-(4-pyridyl)benzhydrol (LOH) with [Ag(CH 3 CN) 4 ]BF 4 and AgPF 6 , respectively. Their solid state arrangements are reported and analyzed. The two structures are based on the combination of coordination bonds and non-covalent interactions. The silver ions are coordinated by two pyridine rings giving the wheel-and-axle Ag(LOH) 2 1 complex; the anions bridge the cations by means of hydrogen bonds with the OH groups: the result is a hybrid organic/inorganic hydrogen bonded network. A hierarchy in the importance and robustness of the supramolecular motifs observed in the two compounds is established, and the structural role of the anions is discussed.

Triarylcarbinol derivatives barter intermolecular interactions to accommodate substituents and create polymorphs

“…These considerations can be useful in view of an application of the pyridine derivatives as ligands in the design of organic/ inorganic networks, 1,2,26,27 since in that case the pyridine acceptor is employed in the coordination bond, and the packing relies on the association propensity of the other functional groups.…”

Water vapour uptake and extrusion by a crystalline metallorganic solid based on half-sandwich Ru(ii) building-blocks

“…1 Among the organic WAAs the wheel-and-axle diols (WAAD) have been extensively studied for their remarkable clathrating properties with hydrogen bond-acceptor solvents. 2 Some of us have recently shown the possibility of constructing inorganic versions of WAADs using the sterically demanding pyridyl-alcoholic ligand a-4-(pyridyl)benzhydrol as wheels, and the N py -M-N py coordination bonds as the central axle in a linear (Ag I ), 3 or square planar (Pd II ) geometry (Scheme 1 for Pd II ). 4 The palladium complexes have shown reversible vapour solvent uptake without loss of crystallinity.…”

Organometallic chemistry meets crystal engineering to give responsive crystalline materials

“…The solid state arrangements and the dynamic host-guest chemistry of several WAADs containing different transition metal ions were deeply investigated in our laboratory. 13 Later on, we became interested in verifying the possibility of fabricating WAAs bearing the metal in the wheels. For reaching the target we chose the organometallic building block [(arene)RuX 2 ] just as a wheel.…”