Triarylcarbinol derivatives barter intermolecular interactions to accommodate substituents and create polymorphs

Unusual hydrogen bonded (OH)4 tetrahedral nests organize zinc(ii) coordination complexes in a non covalent diamondoid network

“…Similar tetrameric (OH) 4 aggregates, generally with lower symmetry, are found also in some of the organic triarylcarbinol parents of LOH, namely in triphenylmethanol, 6 a-malachite green (Fig. 3), 7 4-49-bis(diphenylhydroxymethyl)biphenyl 3b and rac-2,3-diphenyl-2,3-butanediol; 8 a closely related 'OH nest' is found as 'hydrogarnet defect' in chabazite and sodalite zeolites. 9 Remarkably, these (OH) 4 nests constitute relatively robust, non covalent assemblies whose tetrahedral topology arises from supramolecular self recognition between the molecules, without the need of a central templating element.…”

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

“…4a), 22 thus generating an open two-dimensional grid that resembles the one observed for palladium-based WAADs. 4 The grids optimize the packing by a perpendicular interdigitation (Fig. 4b) that takes advantage of a further hydrogen bond between the water molecule and a chlorine atom of a dimer belonging to the neighbouring perpendicular grid [O3-H/Cl2(Àx, 1/2 + y, À1/2 À z), O/Cl ¼ 3.110(3)…”

“…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. 4 As a continuation of this research line, here we present the attempt to construct a new series of WAA systems based on half-sandwich Ru(II) complexes, that is a metallorganic version of WAAs that we call WAAMO (wheel-and-axle metallorganic, Scheme 1).…”

“…4 The palladium complexes have shown reversible vapour solvent uptake without loss of crystallinity. 4 As a continuation of this research line, here we present the attempt to construct a new series of WAA systems based on half-sandwich Ru(II) complexes, that is a metallorganic version of WAAs that we call WAAMO (wheel-and-axle metallorganic, Scheme 1). These systems have been designed by considering the half-sandwich Ru(II) metallorganic moiety…”

Fabricating organometallic wheel-and-axle compounds for the creation of dynamically porous crystalline materials

“…These are molecules or molecular assemblies formed by a linear central axle connecting two relatively bulky end groups, as depicted in Figure 2. For this reason we chose metals favouring linear or square planar coordination geometries, such as Ag(I), 13 Pd(II) or Pt(II), 14 respectively. This aspect has been reviewed by Soldatov in 2006.…”