Results 81 to 90 of about 6,769 (240)

Novel π-Expanded Radialene Macrocycles with Inner Cavity [PDF]

, 2016
Polyenyne macrocycles with π-extended [9]- and [12]radialene frameworks have been synthesized. These radialenes exhibit restricted rotation of the aromatic rings, and the D3- and D4-symmetric structures in solutions have been determined by dynamic NMR ...
Nobuko Nakamura (2700388), Masahiko Iyoda (1351731), Sachiko Yamagata (2700394), Yoshiyuki Kuwatani (2513884), Gaku Yamamoto (287387), Mie Todaka (2700391)   +5 more
core   +1 more source

Crystal structure of tetraaqua(dimethylformamide)tetrakis(μ-N,2-dioxidobenzene-1-carboximidato)tetrakis(μ-trimethylacetato)tetramanganese(III)sodiumyttrium–dimethylformamide–water (1/8.04/0.62)

Acta Crystallographica Section E: Crystallographic Communications, 2015
The synthesis and crystal structure for the title compound, [YNaMn4(C7H4NO3)4(C5H9O2)4(H2O)3.76(C3H7NO)0.24]·8.04C3H7NO·0.62H2O or [YIIINa(OTMA)4[12-MCMn(III)N(shi)-4](H2O)3.76(DMF)0.24·8.04DMF·0.62H2O, where OTMA is trimethylacetate, MC is metallacrown,
Jordan R. Travis, Matthias Zeller, Curtis M. Zaleski   +2 more
doaj   +1 more source

Lanthanide complexes of macrocyclic derivatives useful for medical applications [PDF]

, 2005
The protonation constants of two series of tetraazamacrocyclic ligands with acetate and methylphosphonate pendant arms, as well as their stability constants with Cu2+, La3+, Sm3+, and Ho3+, were determined.
Delgado, R, Guerra, KP, Costa, J, Lima, LMP   +3 more
core   +1 more source

A dodecamethoxy[6]cycloparaphenylene consisting entirely of hydroquinone ethers: unveiling in-plane aromaticity through a rotaxane structure

Nature Communications, 2023
[n]Cycloparaphenylenes ([n]CPPs, where n is the number of phenylene groups), consisting of 1,4-linked phenylene unit, have attracted much attention due to their cyclic π-conjugated structures and physical properties.
Naoki Narita, Yusuke Kurita, Kohtaro Osakada, Tomohito Ide, Hidetoshi Kawai, Yoshitaka Tsuchido   +5 more
doaj   +1 more source

Polarity on Demand: Nucleophilic, Electrophilic, and Ambiphilic Reactivity at a 9,10‐Dihydro‐9,10‐Disilaanthracene Platform

Chemistry – A European Journal, EarlyView.
A 9,10‐dihydro‐9,10‐disilaanthracene platform was efficiently synthesized and features intrinsically electrophilic Si sites. Upon stepwise reductive Si─H bond cleavage, these Si sites are converted into nucleophilic centers. This controlled polarity switching also enables ambiphilic reactivity within a homo‐heteroelement framework.
Moritz Schmidt, Alexander Virovets, Eugenia Peresypkina, Hans‐Wolfram Lerner, Matthias Wagner   +4 more
wiley   +1 more source

Synthesis, Conformational Studies, X-ray Structures, and Complexation Properties of Semirigid Macrocyclic Phosphonamides [PDF]

, 2016
The semirigid phosphonamide ligands 1−5 have been synthesized from the macrocyclic precursors 6−9 by reaction with 1,3-propanediol ditosylate or 1,2-dichloroethane.
Bernard Tinant (1415800), Jean-Pierre Dutasta (1287240), Pascale Delangle (145144), Jean-Paul Declercq (2998608), Luc Van Oostenryck (3038643)   +4 more
core   +1 more source

Homo‐/Heterodimeric Substrates Bias the Type and Multiplicity of Hydroxamic Acid Chelators Assembled by a NIS Synthetase DesD

Chemistry – A European Journal, EarlyView.
Chemoenzymatic reactions using the siderophore synthetase DesD from Salinispora tropica and hydroxamic acid substrates (native, non‐native) with different multiplicities (monomer, dimer) and components (homo‐/heterodimer) followed different reaction trajectories, which biased the architectures of the chelator major products and indicated DesD contains ...
Callum A. Rosser, Todd E. Markham, Rachel Codd   +2 more
wiley   +1 more source

Synthesis, Conformational Studies, X-ray Structures, and Complexation Properties of Semirigid Macrocyclic Phosphonamides. [PDF]

, 1996
The semirigid phosphonamide ligands 1-5 have been synthesized from the macrocyclic precursors 6-9 by reaction with 1,3-propanediol ditosylate or 1,2-dichloroethane.
Van Oostenryck, Luc, Tinant, Bernard, Declercq, Jean-Paul, Delangle, Pascale, Dutasta, Jean-Pierre   +4 more
core   +1 more source

Crystal structure and supramolecular features of a host–guest inclusion complex based on A1/A2-hetero-difunctionalized pillar[5]arene

Acta Crystallographica Section E: Crystallographic Communications
A host–guest supramolecular inclusion complex was obtained from the co-crystallization of A1/A2-bromobutoxy-hydroxy difunctionalized pillar[5]arene (PilButBrOH) with adiponitrile (ADN), C47H53.18Br0.82O10·C6H8N2.
Mickey Vinodh, Talal F. Al-Azemi
doaj   +1 more source

Isodesmic Supramolecular Assembly of Phenylethynylene Bis‐Urea Macrocycles

Chemistry – A European Journal, EarlyView.
A soluble phenylethynylene bis‐urea macrocycle assembles in polar media via an isodesmic hydrogen bonded mechanism. Spectroscopic and morphological studies reveal nanoscale aggregates with short chain length, while guest additives modulate enthalpy and polymerization, demonstrating tunable supramolecular assembly.
Fahidat A. Gbadamosi, Kazi Md Zubaer, Vaibhavi A. Samant, Jillian Eubanks, Sophya Garashchuk, Linda S. Shimizu   +5 more
wiley   +1 more source