An azobenzene bridge was introduced into the lower (or smaller) rim of p-tert-butylcalix[8]arene to form 1,5-singly bridged calix[8]arene derivatives, respectively. Bridged calix[8]arene of conformationally rigid wereisolated. The stability of the two structures of bridged calix[8]arenes have been compared.The study of organicstructure to form nanoporous structures is a well known in chemistry ...

Herein we report the successful synthesis and isolation of tiara[6]arene, a constitutional isomer calix[6]arene consisting six phenol units linked by para-substituted methylene bridges, from an isomeric mixture asymmetrically substituted pillar[6]arene intermediates. Similar to its pentameric analogue, tiara[6]arene displays high conformational freedom in solution rich polymorphism solid state....

Non-covalent interactions of aromatics are important in a wide range of chemical and biological applications. The past two decades have seen numerous reports of arene-arene binding being understood in terms Hammett substituent constants, and similar analyses have recently been extended to cation-arene and anion-arene binding. It is not immediately clear why electrostatic Hammett parameters shou...

Arene ruthenium complexes containing long-chain N-ligands L = NC5H4–4-COO–C6H4–4-O–(CH2)9–CH3 or L 2 = NC5H4–4-COO–(CH2)10– O–C6H4–4-COO–C6H4–4-C6H4–4-CN derived from isonicotinic acid, of the type [(arene)Ru(L)Cl2] (arene = C6H6, L = L : 1; arene = p-MeC6H4Pr , L = L: 2; arene = C6Me6, L = L : 3; arene = C6H6, L = L : 4; arene = p-MeC6H4Pr , L = L: 5; arene = C6Me6, L = L : 6) have been synthe...

A pillar[5]arene dimer was synthesized by linking a mono-hydroxylated pillar[5]arene with 1,4-bis(bromomethyl)benzene. The pillar[5]arene dimer formed stronger complexes with n-alkanes than did a monomeric pillar[5]arene.

quantum chemical calculations, based on density functional theory (dft) method, were performed on calix[4]arene and polychlorinated dibenzo-p-dioxins (pcdds) in gas and liquid phases for comparison purposes. the simulation results show the 1,2,3,4, 6,7,8,9-octachlorodibenzo-p-dioxin (ocdd) is quite a reactive dioxin. this paper attempts to examine the possibility of dioxin adsorption by calix[n...

the conformational behavior of monosubstituted tri-methylsilyle ethynyl derivative of cal ix[4]arene as a newgeneration of caliarene was compared with tetra alkylated calyx[4]arene. the most important conformationalphenomena in these compounds which are pinched cone interconversion process were done by semi-empiricalmethod and ab initio calculations with gaussian 98w programming.

The coordination polymers [Ag4 (O2 CCF3 )4 (phen)3 ]⋅ phen⋅arene (1⋅phen⋅arene) (phen=phenazine; arene=toluene, p-xylene or benzene) have been synthesised from the solution phase in a series of arene solvents and crystallographically characterised. By contrast, analogous syntheses from o-xylene and m-xylene as the solvent yield the solvent-free coordination polymer [Ag4 (O2 CCF3 )4 (phen)2 ] (2...

Neutral or cationic arene ruthenium complexes providing both hydrophilic as well as hydrophobic properties due to the robustness of the ruthenium-arene unit hold a high potential for the development of metal-based anticancer drugs. Mononuclear arene ruthenium complexes containing P- or N-donor ligands or N,N-, N,O- or O,O-chelating ligands, dinuclear arene ruthenium systems with adjustable orga...

The ability of the hydrosoluble ruthenium(II) complexes [RuCl2(h-arene)(PTA)] 3a–d, [RuCl2(h-arene)(PTA-Bn)] 4a–d, [RuCl2(h-arene)(DAPTA)] 5a–d, [RuCl2(h-arene)(TPPMS)] 6a–d (arene = C6H6, p-cymene, 1,3,5-C6H3Me3, C6Me6) to promote the atom-economic formation of b-oxo esters, by addition of carboxylic acids to terminal propargylic alcohols in water has been explored. Scope, limitations and cata...