نتایج جستجو برای: alkyl group
تعداد نتایج: 991429 فیلتر نتایج به سال:
H a r r y F . W i d i n g a n d L e o n a r d S . L e v i t t Department of Chemistry, College o f Science, The University o f Texas at El Paso, El Paso, Texas 79968 Z. Naturforsch. 34b , 321 -326 (1979) ; received August 29, 1978 Alkyl Induct ive Ef fect , Induct ive Substituent Constants of Alkyl Groups Three models o f alkyl groups, " d e r e a l i z a t i o n " , " throughthe -bond" , and "...
Surface organometallic chemistry (SOMC) represents a unique synthetic platform for the preparation of model heterogeneous catalysts resembling those broadly applied in industry. SOMC techniques usually rely on grafting tailored molecular precursors onto surface OH groups oxide supports. The development such and understanding their reactivity with supports are therefore crucial well-defined spec...
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The synthesis of a range PBP supported palladium pincer complexes with different alkyl ligands is described. rates CO 2 insertion into the group are quantified and rationalized based on identity ligand.
Organophosphate esters (OPEs), a major group of organophosphorus flame retardants, are regarded as emerging environmental contaminants of health concern. Amino acid decarboxylases catalyze the conversion of amino acids into polyamines that are essential for cell proliferation, hypertrophy and tissue growth. In this paper, inhibitory effect of twelve OPEs with aromatic, alkyl or chlorinated alky...
Effects of cationic structure on cellulose dissolution in ionic liquids: a molecular dynamics study.
In recent years, great progress has been made in the dissolution of cellulose with ionic liquids (ILs). However, the mechanism of cellulose dissolution, especially the role the IL cation played in the dissolution process, has not been clearly understood. Herein, the mixtures of cellulose with a series of imidazolium-based chloride ionic liquids and 1-butyl-3-methyl pyridinium chloride ([C(4)mpy...
Four generations of monodendrons with multiple dodecyl alkyl tails (AA-N, N representing number of alkyl tails from 1 to 8), an azobenzene spacer group, and a carboxylic acid polar head have been studied at the air-water and air-solid interface using AFM, GIXD, X-ray reflectivity, and UV-vis spectrometry. The one and two tail molecules formed orthorhombic lateral packing with long-range intramo...
A series of benzyl propargyl ethers were synthesized and tested as inhibitors of 5-lipoxygenase, the key enzyme involved in leukotriene biosynthesis. Among these, optimum activity was displayed by 1-(2-heptynyloxymethyl) benzene 12 (IC50 1.2 microM). Addition of carboxyl group at the end of the alkyl side chain attached to the acetylenic group abolished the inhibition. Selective reduction of th...
My group developed a simple method to prepare copper nitride fine particles from copper carboxylate in a solvent of long-chain alcohols without the use of high temperatures or high pressures. By selecting copper acetate or copper decanoate as the copper source, my group demonstrated that the morphology of the copper nitride fine particles varied between cubic and plate-like, respectively. Altho...
Cross-electrophile coupling, the cross-coupling of two different electrophiles, avoids the need for preformed carbon nucleophiles, but development of general methods has lagged behind cross-coupling and C-H functionalization. A central reason for this slow development is the challenge of selectively coupling two substrates that are alike in reactivity. This Account describes the discovery of ge...
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