نتایج جستجو برای: c20 cages complexes
تعداد نتایج: 144873 فیلتر نتایج به سال:
abstract amino acids are building blocks of proteins, and play a vital role in living beings existence and their functionality. the interaction of these compounds with metal ions is of great importance to biochemists, and chemists, because their functions can be utilized as a model in understanding enzymes mechanism for transport of metal ions to tissues. among twenty essential amino acids w...
Methylarachidonylfluorophosphonate (MAFP) and related analogs have been shown to inhibit fatty acid amidohydrolase activity (FAAH), the enzyme responsible for hydrolysis of the endogenous cannabinoid ligand anandamide. To fully characterize this class of compounds, methylfluorophosphonate compounds with saturated alkyl chains ranging from C8 to C20 along with C20 unsaturated derivatives were sy...
abstract the influence of cation?? and anion?? interactions on the strength and nature of n…h hydrogen bond has been investigated by quantum chemical calculations in s-triazine…3hf complex. ab initio calculations were performed at mp2/6-311++g(d,p) level of theory. the natural bond orbital (nbo) analysis and the bader’s quantum theory of atoms in molecules (aim) were also used to elucidate t...
Kemp’s triacid (cis,cis-1,3,5-trimethylcyclohexane-1,3,5-tricarboxylic acid, H3kta) was reacted with uranyl nitrate under solvo-hydrothermal conditions in the presence of diverse counterions or additional metal cations to give eight zero- diperiodic complexes. All coordination polymers series, [PPh3Me][UO2(kta)]·0.5H2O (1), [PPh4][UO2(kta)] (2), [C(NH2)3][UO2(kta)] (3), [Cd(bipy)3][UO2(kta)]2 (...
Fullerenes are molecules created solely of carbon and have a highly unusual attributes. The smallest structure in the fullerene family is conformation C20, which consists of pentagonal rings only, resulting in its instability. The C60 is the first fullerene containing 12 pentagonal and 20 hexagonal rings in which pentagons do not share an edge. It results in good stability of the carbon cage. T...
The starvation effects on the fatty acids composition of the digestive gland of the scallop Flexopecten glaber were underwent in this study. Results show that food deprivation induces a diminution of the amounts of the EPA (C20:5n-3) and the DHA (C22:6n-3) as well as the n-3/n-6 ratio. Meanwhile, a selective retention, in terms of increase of percentage, of the AA (C20:4n-6) in unfed specimens ...
aminocarboxylic acids, such as 2-aminobenzoic acid, react easily with [ir(cod)(pme3)3]cl, (cod=1,5-cyclooctadiene), in thf to produce hydridoaminocarboxylato iridium(iii) complexes in high yields. these octahedral complexes are formed via oxidative addition reaction of the o-h bond of the carboxylic group with the central metal. the starting iridium(i) complex losses the cod molecule, the chlor...
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