Elemental fluorine

Chambers, Richard D.; Fox, Mark A.; Sandford, Graham; Trmcic, Jelena; Goeta, Andrés E.

doi:10.1016/j.jfluchem.2006.09.010

Cited by 58 publications

(17 citation statements)

References 17 publications

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“…[6] In the present case, the carbon-sulfur bond lengths C 3 -S 19 = 1.7911 and C 20 -S 19 = 1.8447Á, while the reported values are 1.7846 (XRD), 1.792 (MP2), 1.811Á (DFT) and 1.771 (XRD), 1.803 (DFT), 1.783Á (MP2). [7] The aromatic ring of the title compound is somewhat irregular and the spread of CC bond distance is 1.3865-1.4197Á, which is similar to the spread reported by Smith et al [26] Chambers et al [99] reported the N-O bond lengths in the range 1.2201-1.2441Á and C-N length as 1.4544Á. The experimental values of N-O bond lengths are 1.222 to 1.226Á and C-N lengths in the range 1.442-1.460Á.…”

Section: Geometrical Parameters and First Hyperpolarizabilitysupporting

confidence: 76%

Vibrational spectroscopic studies and computational study of methyl(2‐methyl‐4,6–dinitrophenylsulfanyl)ethanoate

Panicker¹,

Raj²,

Varghese

et al. 2010

J Raman Spectroscopy

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FT-IR and FT-Raman spectra of methyl(2-methyl-4,6-dinitrophenylsulfanyl)ethanoate (MDIE) were recorded and analyzed. Surface-enhanced Raman scattering (SERS) spectra were recorded in silver colloid and silver electrode. The vibrational wavenumbers were computed using HF/6-31G * and B3LYP/6-31G * basis. The data obtained from vibrational wavenumber calculations are used to assign vibrational bands obtained in infrared and Raman spectroscopies as well as in SERS of the studied molecule. The first hyperpolarizability and infrared intensities are reported. The geometrical parameters of the title compound are in agreement with the reported similar derivatives. The presence of new bands at 1045 and 948 cm −1 in the SERS spectrum in silver electrode is related to the change in orientation of the molecule with respect to the metal surface. In silver colloid SERS spectrum, the methyl group attached to the methoxy carbonyl group is close to the metal surface, whereas on silver electrode the methyl group attached to the phenyl ring is close to the metal surface.

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Section: Geometrical Parameters and First Hyperpolarizabilitysupporting

confidence: 76%

Vibrational spectroscopic studies and computational study of methyl(2‐methyl‐4,6–dinitrophenylsulfanyl)ethanoate

Panicker¹,

Raj²,

Varghese

et al. 2010

J Raman Spectroscopy

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“…Even aromatic systems that bear two strong electron withdrawing groups that are in positions meta to one another and are, of course, very deactivated towards electrophilic attack, can be fluorinated using acidic reaction media (Scheme 20) using microreactor techniques [45].…”

Section: Benzenoid Compoundsmentioning

confidence: 99%

Elemental fluorine in organic chemistry (1997–2006)

Sandford

2007

Journal of Fluorine Chemistry

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125

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“…A pioneering work by Chambers and Spink was reported in 1999, [7] and since then direct fluorination using microreactors has been studied extensively. [8] For example, fluorination of 1,3-dicarbonyl compounds can be easily accomplished as shown in Scheme 1.…”

Section: Applications Of Flash Chemistry In Organic Synthesismentioning

confidence: 99%

Flash Chemistry: Fast Chemical Synthesis by Using Microreactors

Yoshida

Nagaki

Yamada

2008

Chemistry A European J

539

220

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This concept article provides a brief outline of the concept of flash chemistry for carrying out extremely fast reactions in organic synthesis by using microreactors. Generation of highly reactive species is one of the key elements of flash chemistry. Another important element of flash chemistry is the control of extremely fast reactions to obtain the desired products selectively. Fast reactions are usually highly exothermic, and heat removal is an important factor in controlling such reactions. Heat transfer occurs very rapidly in microreactors by virtue of a large surface area per unit volume, making precise temperature control possible. Fast reactions often involve highly unstable intermediates, which decompose very quickly, making reaction control difficult. The residence time can be greatly reduced in microreactors, and this feature is quite effective in controlling such reactions. For extremely fast reactions, kinetics often cannot be used because of the lack of homogeneity of the reaction environment when they are conducted in conventional reactors such as flasks. Fast mixing using micromixers solves such problems. The concept of flash chemistry has been successfully applied to various organic reactions including a) highly exothermic reactions that are difficult to control in conventional reactors, b) reactions in which a reactive intermediate easily decomposes in conventional reactors, c) reactions in which undesired byproducts are produced in the subsequent reactions in conventional reactors, and d) reactions whose products easily decompose in conventional reactors. The concept of flash chemistry can be also applied to polymer synthesis. Cationic polymerization can be conducted with an excellent level of molecular-weight control and molecular-weight distribution control.

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Elemental fluorine

Cited by 58 publications

References 17 publications

Vibrational spectroscopic studies and computational study of methyl(2‐methyl‐4,6–dinitrophenylsulfanyl)ethanoate

Vibrational spectroscopic studies and computational study of methyl(2‐methyl‐4,6–dinitrophenylsulfanyl)ethanoate

Elemental fluorine in organic chemistry (1997–2006)

Flash Chemistry: Fast Chemical Synthesis by Using Microreactors

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