Dynamic Transformation and Reversible Guest Encapsulations of Pseudopolymorphs of a Fully Fluorinated β-Diketonate Pd(II) Complex

Abstract

Two types of pseudopolymorphs, 1·(2)3 and 1·(2)2, were obtained from Pd­(II) complex (1) with mesitylene (2), and the quantitative transformation into 1·(2)2 from 1·(2)3 was observed over 6 h after shaking for approximately 10 s. The transformation was observed in both a mesitylene-rich solution and under powder conditions. The guest release processes of 1·(2)3 and 1·(2)2 occurred in hexane to yield 1, and the guest insertion processes occurred in 2 to reproduce 1·(2)3 and 1·(2)2, whereas each crystal was constructed from the discrete molecules of each type. These crystals also selectively and repeatedly encapsulated three benzenes or one toluene in the uniform cavities of 1·(2)3 and 1·(2)2. In contrast, the corresponding nonfluorinated derivative, [Pd­(dbm)2] (dbm = dibenzoylmetanide), shows no guest encapsulation phenomena, indicating that the remarkable guest encapsulations are induced by fluorine substitutions. The dynamic crystal transformation and the reversible guest encapsulations of the two pseudopolymorphs were investigated by X-ray crystallographic and thermogravimetric studies for both single crystals and powder species.

Group-10 π-hole⋯dz2[MII] interactions: a theoretical study of model systems inspired by CSD structures

“…Finally, it is worthy to comment the X-ray structure of reference code VOLKAK 42 where a Pt( ii ) square planar complex interacts with an electron rich aromatic ring (Fig. 5).…”

“…This distance is comparable to those observed for the structures commented above. The other selected example (SERDOJ, 41 Finally, it is worthy to comment the X-ray structure of reference code VOLKAK 42 where a Pt(II) square planar complex interacts with an electron rich aromatic ring (Fig. 5).…”

I - Ecologically responsible and efficient recycling of Pd from aqueous effluents using biosorption on biomass feedstock

“…The ability of Pd II to develop stable complexes with unsaturated systems could provide an explanation. Pd II -p interactions have already been reported as the driving force for guest encapsulation (Nakajima and Hori, 2014). Rios et al have described that arenes derived from phenols could form p-bonds to palladium in a h 6 coordination mode (Rios et al, 2012).…”

Predominantly ligand guided non-covalently linked assemblies of inorganic complexes and guest inclusions

“…Above discussions suggest self-assemblies guided by ligands of inorganic complexes and their host-guest complexes provide molecular understanding reflecting on the material properties, and to generate assembled structures of simple inorganic ionic complexes with interesting properties. [140][141][142] Study on these assemblies at the interfaces provides interesting optical, magnetic, electrical and transport properties and provides a basis for the epitaxial growth of crystals with modified properties with respect to a parent crystal. The strength of associations with guests and kinetics of delivery caters to understand transport and delivery of guests.…”