neopentane mass spectrum

All Rights Reserved. Kimura, K.; Katsumata, S.; Achiba, Y.; Yamazaki, T.; Iwata, S., Ionization potentials of some molecules, Pays-Bas, 1983, 102, 109. A neopentyl substituent or a neopentyl compound has the structure Me3C-CH2- for instance neopentyl alcohol. The interactive spectrum display requires a browser with JavaScript and Thermal and vapor pressure data for tetramethylmethane from 13.22°K to the boiling point. Follow the links above to find out more about the data ; Squires, R.R., NIST Standard Reference Osborn, Ann G.; Douslin, Donald R., J. Res. ; Schat, G.; Evers, E.A.I.M. Proj. This site requires that Javascript be enabled. LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi Part 4.-n-Pentane, isopentane, neopentane, View image of digitized DePuy, C.H. (e.g.. Data from NIST Standard Reference Database 69: The National Institute of Standards and Technology (NIST) shall not be liable for any damage that may result from Phys., 1964, 40, 2114. d(ln(kH))/d(1/T) = Temperature dependence constant (K), Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, Henry's Law data, IR Spectrum, Mass spectrum (electron ionization), References, Notes, Data evaluated as indicated in comments: The entropy from its Raman spectrum,     ΔvapH = J. Phys. All rights reserved. Neopentane is an extremely flammable gas at room temperature and pressure which can condense into a highly volatile liquid on a cold day, in an ice bath, or when compressed to a higher pressure. Das, Tarun R.; Reed, Charles O.; Eubank, Philip T., Standard Reference Data Act. Faraday Soc., 1967, 63, 2357-2361. Your browser does not support JavaScript. with the development of data collections included in J. XLII.Ionization potentials and ionic heats of formation for C1-C4 alkyl radicals, Faraday Trans. Chem. That isn't a problem you are likely to meet at A'level. form is Data from NIST Standard Reference Database 69: The National Institute of Standards and Technology (NIST) Then their blood and liver tissue were collected and analyzed by means of GC and GC-MS. MS - José A. Martinho Simões. Your institution may already be a subscriber. The interactive spectrum display requires a browser with JavaScript and Jonas, A.E. Neopentane has T d symmetry. Streiff, A.J., uses its best efforts to deliver a high quality copy of the NIST/EPA Gas-Phase Infrared Database Thermodyn., 1981, 13, 415-421.     Tr = reduced temperature (T / Tc). Use or mention of technologies or programs in this web site is not DH - Eugene S. Domalski and Elizabeth D. Hearing, Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Reaction thermochemistry data, Henry's Law data, Gas phase ion energetics data, IR Spectrum, Mass spectrum (electron ionization), References, Notes, Data compiled as indicated in comments: J. Phys. [all data], Olmsted, Street, et al., 1964 ; Rowlinson, J.S. , Am. NIST subscription sites provide data under the [all data], Jonas, Schweitzer, et al., 1973 Heat Capacities and Entropies of Organic Compounds II. ; Crystal phase 1 phase; Uncertainty assigned by TRC = 0.02 K; Crystal phase 1 phase; Uncertainty assigned by TRC = 0.03 K; Uncertainty assigned by TRC = 0.1 K; Visual, THg; Uncertainty assigned by TRC = 0.1013 bar; Uncertainty assigned by TRC = 0.2027 bar; Uncertainty assigned by TRC = 0.004 l/mol; Uncertainty assigned by TRC = 0.03 mol/l; Based on data from 257. spectrum (can be printed in landscape orientation). been selected on the basis of sound scientific judgment. ); This page was last edited on 21 October 2020, at 20:17. . ; Turner, D.W.; Maier, J.P., crystaline, I, order transition, 140 to 142 K. TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Kenneth Kroenlein director Bieri, G.; Burger, F.; Heilbronner, E.; Maier, J.P., Microsoft Internet Explorer 6.0 does not support some functions on Chemie.DE. Recl. J. Heat capacities and entropies of organic compounds. BS - Robert L. Brown and Stephen E. Stein Follow the links above to find out more about the data As a result, all protons are chemically equivalent leading to a single chemical shift at δ 0.902 in carbon tetrachloride. Steiner, B.; Giese, C.F. Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, Henry's Law data, Gas phase ion energetics data, IR Spectrum, References, Notes. Data compilation copyright To use all functions of this page, please activate cookies in your browser. J. Chem. Chem., 1972, 84, 168. Murrell, J.N. This page allows searching ; Messerly, G.H., This site uses cookies. Data compiled by: NIST Mass Spectrometry Data Center, William E. Wallace, director. Data compilation copyright A theoretical and experimental analysis of the reaction (C4H9+) + NH3 Ü NH4+ + C4H8, The decomposition of neopentane under electron impact, As Np also symbolises the element neptunium (atomic number 93) one should use this abbreviation with care. - 293. . The Gas Phase Acidities of the Alkanes, http://spectrabase.com/spectrum/DctRhAzHcTo Soc., 1959, 81, 3238. Chemical Formula: C 5 H 12: Average Molecular Mass: 72.149 g/mol: Monoisotopic Mass: 72.094 g/mol: CAS Registry Number: 463-82-1: IUPAC Name: 2,2-dimethylpropane: Traditional Name Chem., 1970, 74, 2528-2538. At 116.5 nm (Kr resonance lamp) the primary mass spectrum … I. Ionization potentials of some organic molecules and their interpretation, jcamp-dx.js and Domalski, Eugene S.; Hearing, Elizabeth D., Technology, Office of Data Exact Mass 72.0939 g/mol 13C Nuclear Magnetic Resonance (NMR) Chemical Shifts View the Full Spectrum for FREE! ; Douslin, D.R. Scott D.W., National Institute of Standards and Institute of Standards and Technology, nor is it intended to imply The enthalpies of combustion and formation of the isomeric pentanes, Chesnavich, W.J. values cannot be derived. All rights reserved. [all data], Scott D.W., 1974 Photoelectron spectra of molecules. Pilcher, G.; Chadwick, J.D.M., Evans, S.; Green, J.C.; Joachim, P.J. ; T = 13 to 283 K. Value is unsmoothed experimental datum. ; Gronert, S.; Barlow, S.E. Chirally deuterated neopentane ([2H1,2H2,2H3]-neopentane) is an interesting molecule. 329 pages.$10.00, Male F344 rats were exposed to 1000 to 5000 ppm vapors of neopentane for 80 to 100 min. ; Orchard, A.F. Correlation of the chemical thermodynamic properties of alkane hydrocarbons, Coefficents calculated by NIST from author's data. Der Dampfdruck-Isotopie-Effekt von deuterierten Neopentanen, Lossing, F.P. Copyright for NIST Standard Reference Data is governed by IUPAC nomenclature retains the trivial name neopentane. Boublik, T.; Fried, V.; Hala, E., Copyright © 2020 by John Wiley & Sons, Inc., or related companies. Soc. Measurements of heats of combustion by flame calorimetry. [all data], Aston and Messerly, 1936 Enter the desired X axis range Chim. Requires a JavaScript / HTML 5 canvas capable browser. Dewar, M.J.S. The traditional name neopentane was still retained in the 1993 IUPAC recommendations,[4][5] but is no longer recommended according to the 2013 recommendations. This IR spectrum is from the jcamp-dx.js and     P = vapor pressure (bar) and Informatics, Computational Chemistry Comparison and Benchmark Database, NIST / TRC Web Thermo Tables, "lite" edition (thermophysical and thermochemical data), NIST / TRC Web Thermo Tables, professional edition (thermophysical and thermochemical data). The respective substituent numbers (the 2,2-) are unnecessary because there can be no isomers of this molecule with dimethylpropane as part of their names. L - Sharon G. Lias, Data compiled as indicated in comments: Future versions of this site may rely on Lampe, F.W. The boiling point of neopentane is only 9.5 °C, significantly lower than those of isopentane (27.7 °C) and normal pentane (36.0 °C). on behalf of the United States of America. Restek Corporation, U.S., 110 Benner Circle, Bellefonte, PA 16823Copyright © 2020 Restek Corporation. A few compounds have mass spectra which don't contain a molecular ion peak, because all the molecular ions break into fragments. J. Chem. Chem. ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein Soc., 1936, 58, 2354. Akkerman, O.S. Gas-Phase Acidities Derived from Threshold Energies for Activated Reactions, [all data], Daubert, 1996 Phenom., 1973, 1, 29. ; Scott, D.W., Find out more about the company LUMITOS and our team. Please enable Javascript in your browser. errors or omissions in the Database. Thermodynamic Properties of Neopentane from 4 K to the Melting Point and Comparison with Spectroscopic Data, [all data], Stull, 1947 The melting point of neopentane (−16.6 C), on the other hand, is 140 degrees higher than that of isopentane (−159.9 C) and 110 degrees higher than that of n-pentane (−129.8 C). Olmsted, J., III; Street, K., Jr.; Newton, A.S., Volumetric behavior, vapor pressures, and critical properties of neopentane, J. Chem. Hopfner, A.; Parekh, N.; Horner, Ch. Spectry. NBS, 1945, 263-267. For example, in the mass spectrum of pentane, the heaviest ion has an m/z value of 72. Good, W.D., Chem., 1947, 39, 4, 517-540, https://doi.org/10.1021/ie50448a022 [all data], Watanabe, Nakayama, et al., 1962 Data, 1973, 18, 1, 7-15, https://doi.org/10.1021/je60056a007 http://spectrabase.com/spectrum/DctRhAzHcTo, View entire compound with free spectra: 7 NMR and 1 FTIR. Soc., 1936, 58, 2354. Branched Alkanes and Cycloalkanes, Phys. Aston, J.G. K. See also, Based on data from 343. [2] The preferred IUPAC name is the systematic name 2,2-dimethylpropane, but the substituent numbers are superfluous because it is the only possible “dimethylpropane”. Hossenlopp I.A., ; Bickelhaupt, F., Ind. Dissociation of excited molecular ions, Excess-kinetic-energy ions in organic mass spectra, Chem. Neopentane is a flammable gas at room temperature and pressure which can condense into a highly volatile liquid on a cold day, in an ice bath, or when compressed to a higher pressure. Faraday Trans. ; Bierbaum, V.M. Chem., 1975, 79, 2, 216-222, https://doi.org/10.1002/bbpc.19750790217 All mass spectra in this site (plus many more) are SRD 103b – Thermo Data Engine (TDE) for pure compounds, The photoelectron spectra of the tetrafluoro and tetramethyl compounds of the group IV elements, Select a region with data to zoom. All rights reserved. by the U.S. Secretary of Commerce on behalf of the U.S.A. This anomaly has been attributed to the better solid-state packing assumed to be possible with the tetrahedral neopentane molecule; but this explanation has been challenged on account of it having a lower density than the other two isomers. jcamp-plot.js. click the mouse on the plot to revert to the orginal display. In agreement with previous electron impact and photoionization results parent ions from neopen­ tane were not detected at any wavelength. The following components were used in generating the plot: Additonal code used was developed at NIST: . Chem., 1970, 48, 955. Chim. But this isn't produced by the same ion as the same m/z value peak in pentane. Chem., Univ. View plot Technology, Office of Data Am. (eds. ; Inghram, M.G., intended to imply recommendation or endorsement by the National Read what you need to know about our industry portal chemeurope.com. Pet. J. Chem. GT - Glushko Thermocenter, Russian Academy of Sciences, Moscow, Go To: Top, Gas phase thermochemistry data, Phase change data, Reaction thermochemistry data, Henry's Law data, Gas phase ion energetics data, IR Spectrum, Mass spectrum (electron ionization), References, Notes, Data compiled as indicated in comments: Neopentane, also called 2,2-dimethylpropane, is a double-branched-chain alkane with five carbon atoms. CAL - James S. Chickos, William E. Acree, Jr., Joel F. Liebman, Students of Chem 202 (Introduction to the Literature of Chemistry), University of Missouri -- St. Louis, ΔvapH = ; Semeluk, G.P., Molecular Weight: 72.1488: Formula: C 5 H 12: Melting ... 9-10 °C, 282.1-283.1 °K, 48-50 °F: Density: 586 mg mL −1: Data above sourced from ChemSpider and Wikipedia. [2] This is similar to the silane analog, tetramethylsilane which has a single chemical shift, defined as δ 0 by convention. Am. log10(P) = A − (B / (T + C))

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