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  • 1
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 44 (1961), S. 1400-1413 
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: HÜCKEL and SCF molecular orbitals habe been evaluated for radialene, the parent hydrocarbon of hexamethyl-radialene (hexaethylidene-cyclohexane). The energies of the excited singlet states of this molecule have been calculated by the PARISER-PARR method and also by considering the molecule to be made up of six weakly coupled ethylene fragments. The results are compared with the observed spectrum of hexamethyl-radialene. Both theoretical treatments show that the first absorption band at 38500 cm-l has symmetry B1u (in D6u or A2u (in D3d) which corresponds to a forbidden transition for the planar structure, but is allowed in the puckered D3d configuration. The more intense band at 48800 cm-l is probably E1u (in D6h) or Eu (in D3d) and is allowed in both the planar and the puckered configurations.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The absorption spectra of azobenzene, benzalaniline, stilbene, and of their benzologues R—N=N—-R′, R—CH=N—R′, R—CH=CH—R′ (R, R′ = phenyl, 1-naphthyl, 2-naphthyl), have been compared from a qualitative point of view.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Chichester : Wiley-Blackwell
    Journal of Chemical Technology AND Biotechnology 63 (1995), S. 196-196 
    ISSN: 0268-2575
    Keywords: Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 0030-4921
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    Fire and Materials 1 (1976), S. 63-73 
    ISSN: 0308-0501
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Architecture, Civil Engineering, Surveying , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Full-scale fire tests on domestic beds fully equipped with bedding materials have been carried out in an experimental compartment-corridor facility at the Fire Research Station, Borehamwood, U. K. Mattresses made of hair, spring interior, foam rubber and polyurethane of various types, together with mattress covers of cotton, flame-retarded cotton or proofed nylon were studied. The effectiveness of protective hair or glass fibre interlining was examined. The study has shown that a rapid development of fire in bed and bedding materials can take place with certain combinations of mattresses and their covers. The types of covers extremely important in overall fire development, particularly with polyurethane mattresses. A substantial improvement in the fire behaviour of many of the principal types of beds tested can be achieved by a careful selection of bedding materials, such as the type of mattress cover, and in certain cases by the use of protective interlinings.
    Additional Material: 13 Ill.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    Fire and Materials 10 (1986), S. 21-28 
    ISSN: 0308-0501
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Architecture, Civil Engineering, Surveying , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Large-scale fire experiments have been carried out in a special test rig to study the chemical nature of fire atmosphere using a ‘fingerprint’ sampling and analysis method. Four polymeric materials - wood, polypropylene, polymethyl methacrylate and polystyrene foam - were used separately as fuel, with both high and low ventilation. In addition to oxides of carbon the fingerprints yielded typically between twenty and forty different chemical compounds including several (e.g. aldehydes) which could contribute significantly to the irritancy of the fire gases. The change in nature of the fingerprint gases with the different ventilation conditions, different polymeric materials and with different stages of the same fire is discussed, together with the toxicological significance of the results.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    International Journal of Chemical Kinetics 10 (1978), S. 197-212 
    ISSN: 0538-8066
    Keywords: Chemistry ; Physical Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The hydrogen-atom recombination reaction has been simulated using a molecular dynamics technique recently formulated by the authors [1]. The rate of recombination has been calculated over a range of temperatures and inert gas concentrations (He and Ar) and agrees well with available experimental data. The calculations reproduce the negative activation energy characteristic of an atom recombination process. Over the range of conditions studied recombination was found to proceed via the energy transfer mechanism only, no evidence of bound HAr or HHe species was observed. Recombination was found to occur through an intermediate metastable diatomic molecule which is in equilibrium with its environment and from which there is a bottleneck to the formation of a stable molecule. The initial formation of a metastable species is sensitive to the hydrogen-inert gas potential, but relaxation of the total energy is primary determined by the mass of the third-body and the collision frequency.
    Additional Material: 10 Ill.
    Type of Medium: Electronic Resource
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