The synthesis and cation-binding properties of a series of Calixarene derivatives possessing alkyl chain groups, ester groups and crown ether rings have been investigated. The syntheses of Calix[4]arene crown ethers and Calix[6]arene derivatives possessing alkyl chain, ester group and crown ether ring have been described. In order to evaluate their monovalent cation binding abilities, solvent e...

Heterobimetallic complexes in which half-sandwich complexes of ruthenium(), rhodium() and iridium() are connected by three bromo-bridges to Re(CO)3 have been prepared from metathesis reactions of [RuBr(μ-Br)(arene)]2 (arene = C6H6, C6H3Et3-1,3,5 or p-cymene) or [MBr(μ-Br)Cp*]2 (M = Rh or Ir) with [Re(μ-Br)(CO)3(C4H8O)]2. The crystal structures of [(arene)Ru(μ-Br)3Re(CO)3] (arene = C6H6 ...

Calix[4]arenes constrained to the 1,3-alternate conformation and functionalized at the upper rim with four and two tert-butylnitroxides have been synthesized and characterized by X-ray crystallography, magnetic resonance (EPR and (1)H NMR) spectroscopy, and magnetic studies. The 1,3-alternate nitroxide tetraradical and diradical provide unique polyradical scaffolds for dissection of the through...

In the title compound, [RuCl(C18H15P)(C26H31N2OP)](CF3O3S)·2C3H6O, the Ru(II) ion is coordinated in a three-legged piano stool, half-sandwich-type geometry by a chlorido ligand, a tri-phenyl-phosphine and a tethered η(6)-(phenyl-p-O-meth-oxy) κ(1)-P N-di-phenyl-phosphino N'-diisopropyl amidine ligand charge-balanced by a trifluormethansulfonate counter-anion. The η(6)-coordination mode of the a...

Seleniranium ions at low temperatures (-90 to -78 degrees C) will initiate effective Friedel-Crafts cyclization if a suitably placed arene is allowed to react even when the arene is unactivated. These intermediates generated from N-aryl-N-tosylamides undergo a novel, surprisingly efficient, detosylative cyclization to form 5- or 6-membered nitrogen heterocycles. A debenzylation route is preferr...

Silver nanoparticles capped with nine different sulphonated calix[n]arenes were tested for their anti-bacterial effects against B. subtilis and E. coli at an apparent concentration of 100 nM in calix[n]arene. The results show the para-sulphonato-calix[n]arenes are active against Gram positive bacteria and the derivatives having sulphonate groups at both para and alkyl terminal positions are act...

In the title compound, C(23)H(21)FN(6)O, the dihedral angle between the fluoro-phenyl and pyrimidinone rings is 75.9 (1)°, and the dihedral angle between the methyl-phenyl and pyrazole rings is 40.3 (1)°. In the crystal structure, weak C-H⋯π(arene) and C-N⋯π(arene) inter-actions and intermolecular C-H⋯N and N-H⋯O hydrogen-bonding inter-actions are present.

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...

Open AccessCCS ChemistryMINI REVIEW1 Feb 2021Zigzag Hydrocarbon Belts Tan-Hao Shi and Mei-Xiang Wang MOE Key Laboratory of Bioorganic Phosphorous Chemical Biology, Department Chemistry, Tsinghua University, Beijing 100084 Google Scholar More articles by this author *Corresponding author: E-mail Address: [email protected] https://doi.org/10.31635/ccschem.020.202000287 SectionsAboutAbstractPDF To...

The Ru(II) complex fac-[RuCl(dmso-S)(3)(dmso-O)(2)][PF(6)] (P2) was found to be an excellent precursor for the facile preparation in high yield of half sandwich-type compounds of the general formula fac-[RuCl(dmso-S)(3)(N)(2)][PF(6)] (e.g. (N)(2) = 1,2-diaminoethane (en, 4), trans-1,2-diaminocyclohexane (dach, 5), or 2 NH(3) (6)). Neutral half sandwich-type compounds of the general formula fac-...