Results 91 to 100 of about 44,738 (325)

Beyond the Oxo‐Wall: Synthesis and Reactivity of a Six‐Coordinate Formally CoIV‐Oxo Complex

Angewandte Chemie, EarlyView.
We present the first example of a six‐coordinate formally Co(IV)‐oxo complex, [Co(TQA)(O)(OH)]+ (1), which exists as an admixture of CoIV‐oxo and CoIII‐oxyl resonance structures. Complex 1 is capable of performing oxygen atom transfer reactions and abstracting moderately strong hydrogen atoms at rates faster than other characterized CoIV‐oxo compounds.
Jason Shearer, Ellie Vaynberg, Devin F. Wilson, Kendal W. Southwell, Jindou Yang, Ying Xing, Wonwoo Nam   +6 more
wiley   +2 more sources

Synthesis and liquid crystal properties of some 2,6-disubstituted anthracenes

, 2008
The synthesis and liquid crystalline properties of some new 2,6-disubstituted anthracenes are described. Symmetrical alkylphenyl derivatives exhibit smectic mesophases, whereas simpler structures are non-mesogenic.
Cammidge, Andrew N., Goddard, Victoria H. M.   +1 more
core   +1 more source

Diels-Alder reactions of anthracenes with C-sulfonyldithioformates

, 2003
C-Sulfonyldithioformates (2) (R-1 = ArSO2, R 2 = ArS) readily add to anthracene and 9-methylanthracene (1) in a Diels-Alder fashion with formation of 9,10-dihydro-10,9-(epithiomethano)anthracenes (3) which in turn may suffer thermally induced elimination
Senning, Alexander Erich Eugen, El-Sayed, I., Fischer, A., Ali, O.M.   +3 more
core   +2 more sources

Water, Alcohols, Amines, and Amides as Formal Hydrogen‐Atom‐Transfer Reagents Through Activation With Redox‐Active Lewis Acids

Angewandte Chemie, EarlyView.
Protic molecules containing strong O─H or N─H bonds typically resist hydrogen‐atom abstraction because of the high reactivity of the resulting heteroatom‐centered radicals. However, association of the protic molecules with redox‐active Lewis acids can provide powerful hydrogen‐atom donors or proton‐coupled‐electron‐transfer reagents.
Petra Vojáčková, Armido Studer
wiley   +2 more sources

Structural and Variable-Temperature NMR Studies of 9-Diisopropylphosphanylanthracenes and 9,10-Bis(diisopropylphosphanyl)anthracenes and Their Oxidation Products

, 2016
The diisopropylphosphanyl-substituted anthracenes i-Pr2P(C14H9) (1a), i-Pr2P(C14H8)Br (2a), and (i-Pr2P)2(C14H8) (3a) and some of their oxidation products were prepared from 9-bromoanthracene and 9,10-dibromoanthracene, respectively.
Dietmar Stalke (1407541), Daniel Stern (213946), Gerald Schwab (2346604)   +2 more
core   +4 more sources

Antibacterial potential and chromatographic profiling of bioactive compounds from endophytic Streptomyces sp. strain MIRK71 isolated from Mirabilis jalapa (L.) [PDF]

PeerJ
Multidrug-resistant bacteria pose an alarming global health threat. The persistent rise in antibiotic-resistant infections continues to challenge healthcare systems worldwide.
Lalrokimi, Purbajyoti Deka, William Carrie, Lallawmsangi, Christine Vanlalbiakdiki Sailo, Lalrosangpuii, Felicia Lalremruati, Awmpuizeli Fanai, Yasangam Umbon, Esther Lalnunmawii, Zothanpuia   +10 more
doaj   +2 more sources

at the frontier of glycobiology and integrative medicine: Health implications of an ancient plant

SAGE Open Medicine, 2019
Aloe vera plant extracts are ubiquitous in foods, cosmetics, and medicine. Like all plants, these extracts contain an array of potential bioactives or glycans, which may contribute to health when applied or consumed.
Peter Pressman, Roger Clemens, A Wallace Hayes   +2 more
doaj   +1 more source

Doubly Bridged Anthracenes Blue Emitters for OLEDs [PDF]

The photooxidative stability of a series of doubly bridged anthracenes was evaluated after their preparation via twofold macrocyclization of a bis resorcinyl anthracene.
Ludwig, P., List Kratochvil, E.J.W., Bunz, U.H.F., Rominger, F., Hermerschmidt, F., Mayer, J., Ahrens, L., Freudenberg, J., Ligorio, G.   +8 more
core   +1 more source

Ceric ammonium nitrate and manganese(III) acetate mediated radical oxidation and addition reactions of anthracene and 9-substituted anthracenes

Macedonian Journal of Chemistry and Chemical Engineering, 2012
Radical oxidation and addition reactions of anthracene (1), 9-methylanthracene (2) and 9-phenylanthracene (3) were investigated with dimethyl malonate (4) in the presence of ceric ammonium nitrate (CAN) and manganese(III) acetate (Mn(OAc)3).
Mustafa Zengin, Faith Sonmez, Mustafa Arslan, Mustafa Kucukislamoglu   +3 more
doaj   +1 more source

Diatom aggregation when exposed to crude oil and chemical dispersant: Potential impacts of ocean acidification.

PLoS ONE, 2020
Diatoms play a key role in the marine carbon cycle with their high primary productivity and release of exudates such as extracellular polymeric substances (EPS) and transparent exopolymeric particles (TEP). These exudates contribute to aggregates (marine
Jennifer L Genzer, Manoj Kamalanathan, Laura Bretherton, Jessica Hillhouse, Chen Xu, Peter H Santschi, Antonietta Quigg   +6 more
doaj   +1 more source