258. The supposed isomerism among the palladodiammines

Drew, H. D. K.; Pinkard, Frederic William; Preston, Graham Holmes; Wardlaw, W.

doi:10.1039/jr9320001895

Cited by 56 publications

(22 citation statements)

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“…The metallacycle 1⋅ 6 NO 3 ,13 the aromatic guests 2 b ,14 4 b ,15 4 c ,16 4 e ,17 12 ,15 and 13 ,18 and the Pd II complex,19 were prepared according to literature procedures. All other reagents used were commercial grade chemicals from freshly opened containers.…”

Section: Methodsmentioning

confidence: 99%

Complexation and Catenation in Aqueous Media Using a Self‐Assembled Pd^II Metallacyclic Receptor

Rama

Lopez‐Vidal

García

et al. 2015

Chemistry A European J

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A M2L2 rectangular-shaped metallacycle, obtained by metal-directed self-assembly of a 2-(pyridin-4-ylmethyl)-2,7-diazapyrenium salt and [(en)Pd(NO3)2 (en=ethylenediamine), has been investigated as a molecular receptor for a wide range of aromatic substrates in water. Complexation and catenation of the receptor with selected mono- and polycyclic aromatic substrates produced 1:1 inclusion complexes and [2]catenanes in a highly efficient fashion, as determined by NMR and UV/Vis spectroscopic techniques, as well as single-crystal X-ray crystallography. Furthermore, the thermodynamic and kinetic features of the complexation processes have been analyzed for selected model guests.

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Section: Methodsmentioning

confidence: 99%

Complexation and Catenation in Aqueous Media Using a Self‐Assembled Pd^II Metallacyclic Receptor

Rama

Lopez‐Vidal

García

et al. 2015

Chemistry A European J

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“…Whereas the pyridine-containing bridging ligands undergo substitution at the Pd II centers, allowing for thermodynamically disfavored intermediate structures to rearrange to generate the polyhedral thermodynamic products, the ethylenediamine ligand is kinetically inert due to its five-membered cis -chelating configuration. 67 Thus, the multiple [(en)Pd] 2+ corners also provide structural stability, and may be regarded as solubilizing groups, because ethylenediamine itself is highly soluble in water. The generality of this approach is further demonstrated by examples from the Mukherjee 68 and Klajn 69 groups, who also showed that it is possible to employ imidazole-containing ligands in place of the pyridines originally used by the Fujita group to efficiently form WSCCs ( vide infra ).…”

Section: Strategies For Aqueous Solubility and Stability Of Coordinatmentioning

confidence: 99%

Design and Applications of Water-Soluble Coordination Cages

2020

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Compartmentalization of the aqueous space within a cell is necessary for life. In similar fashion to the nanometer-scale compartments in living systems, synthetic water-soluble coordination cages (WSCCs) can isolate guest molecules and host chemical transformations. Such cages thus show promise in biological, medical, environmental, and industrial domains. This review highlights examples of three-dimensional synthetic WSCCs, offering perspectives so as to enhance their design and applications. Strategies are presented that address key challenges for the preparation of coordination cages that are soluble and stable in water. The peculiarities of guest binding in aqueous media are examined, highlighting amplified binding in water, changing guest properties, and the recognition of specific molecular targets. The properties of WSCC hosts associated with biomedical applications, and their use as vessels to carry out chemical reactions in water, are also presented. These examples sketch a blueprint for the preparation of new metal–organic containers for use in aqueous solution, as well as guidelines for the engineering of new applications in water.

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“…4,4′-Bipyridine, PdCl 2 , and silver salts were acquired from Aldrich Chemicals. The cis -protected Pd(II) units used were synthesized using reported procedures. , The compounds represented by Pd( L′ )(BF 4 ) 2 were prepared by reacting Pd (L′ )Cl 2 with AgBF 4 . Ligand L1 was prepared using a reported procedure .…”

Section: Methodsmentioning

confidence: 99%

“…The cis-protected Pd(II) units used were synthesized using reported procedures. 45,46 The compounds represented by Pd(L′)(BF 4 ) 2 were prepared by reacting Pd(L′)Cl 2 with AgBF 4 .…”

Section: ■ Experimental Sectionmentioning

confidence: 99%

Conformational Solvatomorphism in a [2]Catenane

Prusty

Chartrand

Hanan

et al. 2020

Crystal Growth & Design

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The combination of a flexible pyridine-appended ligand (L1) with 4,4′-bipyridine (L2) and cis-protected Pd(II) units, Pd(L′)(NO 3 ) 2 , in water yielded a concentration-dependent equilibrium mixture of the corresponding [2]catenanes [Pd 2 (L′) 2 (L1)(L2)] 2 (NO 3 ) 8 and their constituent macrocycles [Pd 2 (L′) 2 (L1)(L2)](NO 3 ) 4 . The cis-protecting units (L′) used were ethylenediamine (en), tetramethylethylenediamine (tmeda), 2,2′-bipyridine (bpy), and 1,10-phenanthroline (phen). Crystallization of the [2]catenanes via slow evaporation of their CH 3 CN/ H 2 O (1:1) solutions yielded a single crystalline form in the case of [Pd 2 (2,2′-bpy) 2 (L1)(L2)] 2 (NO 3 ) 8 and two concomitant crystalline forms (solvates) in the case of [Pd 2 (phen) ] 2 (NO 3 ) 8 revealed differences in the orientation of the amide carbonyl group and conformational differences in the ligands and phen units in the macrocycles and may thus be termed conformational solvatomorphs. The molecular packing in all the structures was found to be driven by intermolecular π•••π stacking interactions between the aromatic rings in their cis-protected Pd(II) units. However, because of the awkward shape of the molecules, the closest 2,2′-bpy and phen units in all the structures overlap differently rather than the commonly observed "head-to-tail" or "head-to-head" modes.

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258. The supposed isomerism among the palladodiammines

Cited by 56 publications

References 0 publications

Complexation and Catenation in Aqueous Media Using a Self‐Assembled Pd^II Metallacyclic Receptor

Complexation and Catenation in Aqueous Media Using a Self‐Assembled Pd^II Metallacyclic Receptor

Design and Applications of Water-Soluble Coordination Cages

Conformational Solvatomorphism in a [2]Catenane

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258. The supposed isomerism among the palladodiammines

Cited by 56 publications

References 0 publications

Complexation and Catenation in Aqueous Media Using a Self‐Assembled PdII Metallacyclic Receptor

Complexation and Catenation in Aqueous Media Using a Self‐Assembled PdII Metallacyclic Receptor

Design and Applications of Water-Soluble Coordination Cages

Conformational Solvatomorphism in a [2]Catenane

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Product

Resources

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Complexation and Catenation in Aqueous Media Using a Self‐Assembled Pd^II Metallacyclic Receptor

Complexation and Catenation in Aqueous Media Using a Self‐Assembled Pd^II Metallacyclic Receptor