Ethylenic hydrocarbons

Amylene is a general name for the ethylenic hydrocarbons of the molecular formula CjHio. Two of these hydrocarbons are the main products of the dehydration of the appropriate amyl alcohols ... 

The student is recommended to carry out the reactions of ethylenic hydrocarbons (Section 111,11) with part of the sample of cyclohexene. 

With ethylenic hydrocarbons, as seen on p.237, it is rather difficult to know whether a dangerous reaction is due to the instability of the double bond or its polymerisation. Allylic alcohol dehydration is one example. Alcohols treated in a sulphuric acid medium can form, according to the conditions and the alcohol structure, either an ethylenic hydrocarbon or an ether. 

The paragraphs about the peroxidation of ethylene hydrocarbons (on p.242), secondary alcohols (on p.253) and ethers (on p.200) can be referred to. In this last... 

Ethylenic hydrocarbons, naming, 18 594 Ethylenic poly(disulfide)s, water-insoluble, 23 714... 

If this simple expression is sufficient to account for the discrepancies observed in calculations of olefins based on alkane reference bonds [i.e., calculations using Eq. (10.33) with F = 0], we can claim that the principle (11.8) is, indeed, satisfied by ethylenic hydrocarbons. 

This approach is probably the most convenient one for general use. It could have been applied to the saturated and ethylenic hydrocarbons examined earlier as a rule, one can always use the atom-by-atom method described here, with modifications, if necessary, depending on the class of molecules investigated. 

A) H. Moureau et al, MP 28, 252—64(1938) (Prepn of glycol starting from ethylenic hydrocarbons)... 

For less polar compounds, the solvent effect is weak. However, if the dipole moment of the chromophore increases during the transition, the final state will be more solvated. This is the case for n — n transitions in ethylenic hydrocarbons with a slightly polar double bond. A polar solvent has the effect of stabilising the excited state, which favours the transition. A shift towards greater wavelengths is observed unlike the spectrum obtained in a nonpolar solvent. This is the bathochromic effect. 

McHugh, M. A. Yogan, T. J. Three-Phase Solid-Liquid-Gas Equilibria for Three Carbon Dioxide-Hydrocarbon Solid Systems, Two Ethane-Hydrocarbon Solid Systems, and Two Ethylene-Hydrocarbon Solid Systems. J. Chem. Eng. Data 1984, 29, 112-115. 

All hydrocarbons take up nitrogen, forming probably cyclical polyamines methane and ethylene hydrocarbons seem to give tetramines and acetylene hydrocarbons, diamines. 

Ethylene Hydrocarbon Induction of ripening Induction of ripening of fruits and vegetables 11-39... 

Bolland, Gee, et al. (cf. reference 48) to interpret the oxidation (photochemical, induced, or thermal) of ethylenic hydrocarbons in solution ... 

Table XLIV. Frequencies of Some Ethylenic Hydrocarbons...

The data for other ethylenic hydrocarbons is given in Table CXI. 

The aldehydes, except for benxaldehyde, and the ketones, except for benxophenore. are alike in re ot to their reaction wit ii dipl enylkot n . - i For convenience diphenylketMte is used in the ibnn of the quinoline complex which dissociates above its melting point the reaction, therefore, is run at liO-lCO , and under these con ditions only the ethylene hydrocarbon resulting firem the decomposition of the jS-lactone can be isolated ... 

Since it was Known that the thermal dpoompoeition of the jS-lactone yields an ethylene hydrocarbon and carbon dioxide, the appearance of iheee producte during the neutralizatioa of the -halo addatt. to, wae at first attributed to the degradation of an intermediate lactone. > °... 

Later on it appectred that the two types of reaction, (I) and (11), take place eunultaneouBly and independently the mechanieiD of the formation of the ethylene hydrocarbon has been elucidated. - - Several authors have publi ed monographs on this subject, - ... 

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