Library

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    Thermal transformations of 2-methylfuran in presence of hydrogen at high pressure (1960)
    Springer
    Russian chemical bulletin 9 (1960), S. 311-315 
    Details
    ISSN: 1573-9171
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary 1. An investigation was made of the thermal transformations of 2-methylfuran at 350–375° under high pressures of hydrogen. The liquid products were found to contain acetone, butanone, 2-pentanone, 2-hexanone, 2--heptanone, acetophenone, 2-pentanol, pentane, and water. 2. Under the given conditions, the thermal transformations of 2-methylfuran are accelerated by rise in the pressure of hydrogen and lead to the formation not only of me substances enumerated above, but also of considerable amounts of gaseous and high-boiling products (b.p. above 170°). 3. An investigation was made of the behavior of 2-pentanone under the conditions given above; it was hydrogenated with formation of 2-pentanol, pentane, and water. 4. The possible mechanism of the process studied was examined.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00942909
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Homogeneous destructive hydrogenation of tetralin at high pressures of hydrogen (1958)
    Springer
    Russian chemical bulletin 7 (1958), S. 952-959 
    Details
    ISSN: 1573-9171
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary 1. The homogeneous destructive hydrogenation of tetralin (1,2,3,4-tetrahydronaphthalene) was investigated at 440–462° and at pressures of up to 1200 atm. 2. A general scheme is proposed for the transformations of tetralin under the conditions studied; it is based on the investigation of the reaction products by fractional-distillation and Raman-spectrum methods, and also on kinetic data. 3. The results are in accord with the views expounded in the paper on the radical-chain mechanism of the homogeneous destructive hydrogenation of aromatic hydrocarbons.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00911346
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Combination dispersion [raman] spectra of certain tri- and tetraalkylbenzenes and condensed aromatic hydrocarbons (1961)
    Springer
    Russian chemical bulletin 10 (1961), S. 1344-1349 
    Details
    ISSN: 1573-9171
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary 1. The “characteristicness” [specificity] of criteria of certain tri- and tetraalkylbenzenes has been examined and made more precise. 2. One of the previously proposed spectral criteria of the quaternary carbon atom, the intense line in the 680–750 cm−1 region, is not preserved in the spectra of aromatic hydrocarbons with such an atom. The other criterion, the line in the 900–950 cm−1region, retains its “characteristicness” [specificity] in the benzene series.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00910106
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Homogeneous destructive hydrogenation of xylenes (1961)
    Springer
    Russian chemical bulletin 10 (1961), S. 1595-1597 
    Details
    ISSN: 1573-9171
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary 1. Homogeneous destructive hydrogenation of o-xylene at 460 and 560° occurs faster than for m-xylene. Increase in partial pressure of hydrogen leads to a marked hastening of the reaction. The process is greatly speeded on addition to m-xylene of small amounts of ethylbenzene. 2. Splitting of the first methyl group from the m-xylene molecule occurs in one and a half to two times faster than splitting of the methyl group from the toluene molecule.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00906164
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Investigation of the homogeneous destructive hydrogenation of butylphenols under hydrogen pressure (1961)
    Springer
    Russian chemical bulletin 10 (1961), S. 1576-1579 
    Details
    ISSN: 1573-9171
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary 1. Homogeneous destructive hydrogenation of three isomeric butylphenols at 440° and high hydrogen pressures was investigated. The reaction rate decreased in the series o-n-butylphenol〉 p-n-butylphenol〉p-sec-butylphenol. The difference in the rate of total conversion was determined predominantly by the stage in which there was thermal cleavage of the weakest bond of the alkyl group. 2. A rise in hydrogen pressure accelerated the process of homogeneous destructive hydrogenation of butylphenols. 3. The weakest bonds in n-butylphenols were apparently the β and γ C-C bonds in the alkyl chain; the same was true also for para sec-butylphenol. 4. Comparison of the results obtained led to the conclusion that depending on the increase in the number of carbon atoms in the side chain of the alkylphenol, thermal decomposition processes start to prevail to a greater extent over reactions leading to cleavage of the entire alkyl radical from the aromatic nucleus.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00906158
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Thermal polymerization of C5 olefins at high pressures (1962)
    Springer
    Russian chemical bulletin 11 (1962), S. 1369-1373 
    Details
    ISSN: 1573-9171
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary 1. The thermal polymerization of C5 olefins occurs at 260–270° and 1000–3000 Kg/sq.cm. The rate of polymerization depends on the structure of the C5 olefin: 1-pentene and 3-methyl-1-butene polymerize most rapidly, 2-methyl-1 -butene polymerizes somewhat more slowly, and 2-methyl-2-butene and 2-pentene polymerize most slowly. The C5 olefins studied fall into an analogous sequence when placed in order of the degree of polymerization attained. 2. With increase in pressure the rate of thermal polymerization of C5 olefins rises; this acceleration depends on the structure of the C5 olefin. The polymerization of 2-methyl-2-butene and 2-methyl-2-butene is accelerated by pressure to a greater extent than the polymerization of 1-pentene and 3-methyl-1-butene; on the basis of this it was concluded that the polymerization of the first two C5 olefins meets greater steric hindrance. 3. It was found that the interconversion of the three isomeric methylbutenes occurs under the conditions studied.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00907989
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...