Category: 507-63-1

In an article, author is Wolf, C, once mentioned the application of 507-63-1, SDS of cas: 507-63-1, Name is Heptadecafluoro-1-iodooctane, molecular formula is C8F17I, molecular weight is 545.9629, MDL number is MFCD00001064, category is iodides-buliding-blocks. Now introduce a scientific discovery about this category.

Acid-mediated halogen exchange in heterocyclic arenes: A highly effective iodination method

Heterocyclic arenes including pyridyl, quinolyl and isoquinolyl chlorides have been converted to their corresponding iodides in good to high yields via acid-mediated nucleophilic halogen exchange with sodium iodide. This procedure avoids the use of transition metals, harsh reaction conditions, and affords highly regioselective halide exchange. Chloride substituents in position 2 and 4 of pyridines and quinolines are readily substituted by iodide in 75-91% and conversion of 1-chloroisoquinoline to its iodide derivative was found to proceed with 90% yield. Positions that are not activated for nucleophilic aromatic substitution proved to be inert to halide exchange. Regioselective chloride/iodide exchange in 4,7-dichloroquinoline hydrochloride gave 7-chloro-4-iodoquinoline, an important precursor of anti-malaria drugs, in almost 90% yield.

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Application of 507-63-1, Catalysts allow a reaction to proceed via a pathway that has a lower activation energy than the uncatalyzed reaction. 507-63-1, Name is Heptadecafluoro-1-iodooctane, SMILES is IC(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)F, belongs to iodides-buliding-blocks compound. In a article, author is Li, H., introduce new discover of the category.

Ontogenic changes in human placental sodium iodide symporter expression

The human fetus requires a maternal supply of iodide to synthesize thyroid hormone from 16 weeks gestation. Placental iodide transport is regulated by the sodium iodide symporter (NIS). We studied the ontogeny of NIS in placentas from surgically terminated pregnancies and from normal term pregnancies. NIS mRNA was low at 6 weeks gestation and peaked at 12 weeks gestation. Placental NIS protein levels are significantly correlated with gestational age during early pregnancy and increase with increased placental vascularization. This would lead to increased iodide supply to meet increased fetal requirements for thyroid hormone synthesis as the pregnancy progresses. Crown Copyright (c) 2012 Published by Elsevier Ltd. All rights reserved.

Application of 507-63-1, Each elementary reaction can be described in terms of its molecularity, the number of molecules that collide in that step. The slowest step in a reaction mechanism is the rate-determining step.you can also check out more blogs about 507-63-1.

Reactions catalyzed within inorganic and organic materials and at electrochemical interfaces commonly occur at high coverage and in condensed media, causing turnover rates to depend strongly on interfacial structure and composition, 507-63-1, Name is Heptadecafluoro-1-iodooctane, SMILES is IC(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)F, in an article , author is Huebner, L, once mentioned of 507-63-1, Computed Properties of C8F17I.

Heterometallic lanthanide group 12 metal iodides

Neodymium tri-iodide reacts with Group 12 metal (M; M = Zn, Cd, Hg) iodides to form heterometallic compounds. These Lewis acidic M cleave Nd-I bonds to give either ionic {[(THF)(5)NdI2][MI3THF]; M = Zn, Cd} or charge-neutral {(THF)(5)NdI(mu(2)I)HgI3} compounds. Differences in structure are interpreted primarily in terms of M-L bond strengths, rather than Nd-L bond strengths. Experiments with Yb indicate that if there is any excess iodide present in these syntheses then the most readily isolated product is a triiodide salt, i.e., [(THF)(5)Yb-2][I-3]. In conventional solvents the presence of Lewis acid is not required for iodide displacement-from pyridine, YbI3 crystallizes as [(py)(5)YbI2][I]. These compounds are potentially useful as heterometallic sources of lanthanide-doped iodide matrixes, they illustrate the ease with which iodides are displaced from lanthanide coordination spheres, and they underscore the complexity associated with using lanthanide iodides as Lewis acid catalysts.

Interested yet? Read on for other articles about 507-63-1, you can contact me at any time and look forward to more communication. Computed Properties of C8F17I.

Enzymes are biological catalysts that produce large increases in reaction rates and tend to be specific for certain reactants and products. 507-63-1, Name is Heptadecafluoro-1-iodooctane, molecular formula is C8F17I, belongs to iodides-buliding-blocks compound. In a document, author is Saikia, P, introduce the new discover, HPLC of Formula: C8F17I.

A new ytterbium iodide mediated coupling of acyl cyanides and synthesis of 1,2-diketones

Conversion of acyl cyanides I into 1,2-diketones 2 has been achieved by the action of ytterbium iodide in dry tetrahydrofuran at room temperature, in high yields. (C) 2002 Elsevier Science Ltd. All rights reserved.

Balanced chemical reaction does not necessarily reveal either the individual elementary reactions by which a reaction occurs or its rate law. In my other articles, you can also check out more blogs about 507-63-1. HPLC of Formula: C8F17I.

Chemistry is the experimental and theoretical study of materials on their properties at both the macroscopic and microscopic levels. 507-63-1, Name is Heptadecafluoro-1-iodooctane, molecular formula is C8F17I. In an article, author is Moren, Mari,once mentioned of 507-63-1, Recommanded Product: 507-63-1.

Uptake of iodide from water in Atlantic halibut larvae (Hippoglossus hippoglossus L.)

The natural diet of marine fish larvae, copepods, contain 60-350 mg I kg(-1), while live feed used in commercial hatcheries have iodine concentrations in the range of 1 mg kg(-1). Seawater is also considered to be an important source of iodine for marine fish. The question asked in this study is whether Atlantic halibut larvae are capable of absorbing iodide from the water and if so, can the seawater sustain the iodine requirement during larval development and metamorphosis. Levels of iodide and iodate in seawater samples from four different rearing facilities were analysed. All samples contained relative low levels of iodide (0-22 nM) and except for samples from one site; the levels of iodide and iodate were in agreement with previously published data. The uptake of iodide from seawater was measured by incubating Atlantic halibut larvae in water with a constant level of radioactive iodide (I-125(-)) and increasing levels of cold iodide (I-127(-)). To evaluate whether the uptake of iodide would change during metamorphosis, three different developmental stages (pre metamorphic, metamorphic and post metamorphic) were examined. The uptake was similar for all three stages, increasing with increasing concentration of iodide in the water. The highest level of iodide used was 2000 nM,100 times higher than what was measured in the seawater samples. The uptake curves did not seem to reach equilibrium. This may be due to a constant nonspecific uptake or that the equilibrium level is higher than 2000 nM. The uptake was partly blocked by perchlorate (ClO3-) which is a known inhibitor of the sodium iodide symporter. This indicates that the Atlantic halibut larvae accumulate iodide through both specific and non-specific uptake pathways. (C) 2008 Elsevier B.V. All rights reserved.

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Let¡¯s face it, organic chemistry can seem difficult to learn. Especially from a beginner¡¯s point of view. Like 507-63-1, Name is Heptadecafluoro-1-iodooctane. In a document, author is Gillam, MP, introducing its new discovery. Product Details of 507-63-1.

Functional characterization of pendrin in a polarized cell system – Evidence for pendrin-mediated apical iodide efflux

Pendred’s syndrome is an autosomal recessive disorder characterized by sensorineural deafness, goiter, and impaired iodide organification. It is caused by mutations in the PDS/ SLC26A4 gene that encodes pendrin. Functionally, pendrin is a transporter of chloride and iodide in Xenopus oocytes and heterologous mammalian cells and a chloride/ base exchanger in beta- intercalated cells of the renal cortical collecting duct. The partially impaired thyroidal iodide organification in Pendred’s syndrome suggests a possible role of pendrin in iodide transport at the apical membrane of thyroid follicular cells, but experimental evidence for this concept is lacking. The iodide transport properties of pendrin were determined in polarized Madin- Darby canine kidney cells expressing the sodium iodide symporter ( NIS), pendrin, or NIS and pendrin using a bicameral system- permitting measurement of iodide content in the basal, intracellular, and apical compartments. Moreover, we determined the functional consequences of two naturally occurring mutations ( L676Q and FS306> 309X). In polarized Madin- Darby canine kidney cells, NIS mediates uptake at the basolateral membrane. Only minimal amounts of iodide reach the apical compartment in the absence of pendrin. In cells expressing NIS and pendrin, pendrin mediates transport of iodide into the apical chamber. Wild type pendrin also mediates iodide efflux in transiently transfected cells. In contrast, both pendrin mutants lose the ability to promote iodide efflux. These results provide evidence that pendrin mediates apical iodide efflux from polarized mammalian cells loaded with iodide. Consistent with the partial organification defect observed in patients with Pendred’s syndrome, naturally occurring mutations of pendrin lead to impaired transport of iodide.

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507-63-1, Name is Heptadecafluoro-1-iodooctane, molecular formula is C8F17I, SDS of cas: 507-63-1, belongs to iodides-buliding-blocks compound, is a common compound. In a patnet, author is TOMIYASU, T, once mentioned the new application about 507-63-1.

DIFFERENTIAL DETERMINATION OF IODATE AND IODIDE BY A KINETIC-CATALYTIC METHOD

An analytical method for the determination of iodate and iodide ions at the mug l-1 level in mixtures was investigated. Iodide in samples was first oxidized with sodium nitrite; the free iodine liberated was then released from the solution by heating. Excess nitrite was destroyed with amidosulfuric acid (sulfamic acid). The iodate remaining in the solution was determined by a kinetic-photometric method based on the catalytic effect of iodine on the oxidation of chlorpromazine by hydrogen peroxide in a sulfuric acid solution. The total iodine was also determined by a similar analytical procedure without carrying out operations for the removal of iodide; the iodide was found from the difference between the two results. Mixtures of iodate and iodide in the 0.2 – 5 mug l-1 range of total iodine could be determined within an error of 10%. The proposed method has been successfully applied to a differential determination of iodate and iodide in natural fresh-water samples.

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The reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature. Recommanded Product: 507-63-1, 507-63-1, Name is Heptadecafluoro-1-iodooctane, SMILES is IC(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)F, in an article , author is Shaikhulina, S, once mentioned of 507-63-1.

Laminated tabular AgBrI grains with gradually varied iodide distribution

This paper reports on a precipitation of laminated type tabular crystals (or double-structure grains with bromide-iodide core covered with bromide shell) and describes some of their properties. This type of crystals has been created by means of physical ripening of fine grained emulsion. The fine grained emulsion has been precipitated by the process allowing to vary smoothly iodide content within each grain. A correlation between iodide concentration in the tabular grain’s core as well as profiles of iodide concentration variation and some photographic features of the crystals are under discussion.

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Chemistry, like all the natural sciences, begins with the direct observation of nature¡ª in this case, of matter.507-63-1, Name is Heptadecafluoro-1-iodooctane, SMILES is IC(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)F, belongs to iodides-buliding-blocks compound. In a document, author is Liu, Wenbo, introduce the new discover, Recommanded Product: 507-63-1.

Photon can tremendously accelerate the alkyl iodides’ elimination in water

Elimination of the alkyl halides in water is very difficult due to the heterogeneous nature and the limitation of base strength. We discovered that ultra-violet (UV) light can enhance the elimination rate of alkyl iodides, including primary, secondary, and tertiary iodides in water dramatically for the first time. We propose a tandem radical-carbocation reaction mechanism to rationalize this special property of alkyl iodides. (C) 2015 Elsevier Ltd. All rights reserved.

Note that a catalyst decreases the activation energy for both the forward and the reverse reactions and hence accelerates both the forward and the reverse reactions. you can also check out more blogs about 507-63-1. Recommanded Product: 507-63-1.

Catalysts are substances that increase the reaction rate of a chemical reaction without being consumed in the process. 507-63-1, Name is Heptadecafluoro-1-iodooctane, SMILES is IC(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)F, belongs to iodides-buliding-blocks compound. In a document, author is Chance, Rosie, introduce the new discover, Recommanded Product: Heptadecafluoro-1-iodooctane.

The distribution of iodide at the sea surface

Recent studies have highlighted the impact of sea surface iodide concentrations on the deposition of ozone to the sea surface and the sea to air flux of reactive iodine. The use of models to predict this flux demands accurate, spatially distributed sea surface iodide concentrations, but to date, the observational data required to support this is sparse and mostly arises from independent studies conducted on small geographical and temporal scales. We have compiled the available measurements of sea surface iodide to produce a data set spanning latitudes from 69 degrees S to 66 degrees N, which reveals a coherent, large scale distribution pattern, with highest concentrations observed in tropical waters. Relationships between iodide concentration and more readily available parameters (chlorophyll, nitrate, sea surface temperature, salinity, mixed layer depth) are evaluated as tools to predict iodide concentration. Of the variables tested, sea surface temperature is the strongest predictor of iodide concentration. Nitrate was also strongly inversely associated with iodide concentration, but chlorophyll-a was not.

The proportionality constant is the rate constant for the particular unimolecular reaction. the reaction rate is directly proportional to the concentration of the reactant. I hope my blog about 507-63-1 is helpful to your research. Recommanded Product: Heptadecafluoro-1-iodooctane.