N-heptene

RhCI3 Cross-linked polystyrene-substituted with —CH2PPh2 and —CH2NMe2 polymethylacrylate with —0(CH2)2NMe2 and —0(CH2)2CN n-Heptene 23... 

Solubility in Acetone Carbon tet. Bensene Ether n-Heptene Ethanol Water Water in... 

One of the first reported investigations of the kinetics of dehydro-cyclization is that of Pitkethly and Steiner (P6), who studied the conversion of n-heptane to toluene over a chromia-alumina catalyst at temperatures in the vicinity of 475°C. The data obtained by these investigators suggested that n-heptene was an intermediate in the reaction. Thus, it was observed that at low contact times the concentration of olefins increased much more rapidly with contact time than did the corresponding concentration of aromatics (Fig. 7). After a certain contact... 

Example 11.2. Streamlined network for hydroformylation of n-heptene catalyzed by phosphine-substituted cobalt hydrocarbonyl. In hydroformylation of straight-chain olefins with a phosphine-substituted cobalt hydrocarbonyl catalyst, the model must account for three complications that are absent with cyclohexene isomerization by migration of the double bond along the hydrocarbon chain, formation of isomeric aldehydes and alcohols, and condensation of the straight-chain aldehyde to "heavy ends (chiefly an alcohol of twice the carbon number, such as 2-ethylhexanol from propene via n-butanal and a C8 aldol). A streamlined network for n-heptene is ... 

Consider as a prototype the network 11.13 of n-heptene hydroformylation, keeping in mind that die arrows represent multistep pathways and that the reactions of higher straight-chain olefins involve still more parallel pathways of internal olefin isomers to aldehyde isomers and on to alcohol isomers. In such networks, all but one of the aldehyde-to-alcohol conversions involve the reaction of an aldehyde group on a secondary carbon atom, so that all these pathways can be assumed to involve essentially the same rate coefficients of their steps. Only the conversion of the straight-chain aldehyde (n-octanal to n-octanol in network 11.13) must be expected to occur with somewhat different rate coefficients. Likewise, all con-... 

HEPTDAIENAL see HAV450 4-HEPTENAL see HBI800 cis-4-HEPTEN-l-AL see HBI800 n-HEPTENE see HBJOOO 1-n-HEPTENE see HBJOOO... 

Thus propene dimers, e. g., at 50 °C, have a composition of 22 % n-hexenes, 72 % 2-methylpentenes, and 6% 2,3-dimethylbutenes. Under the same conditions, isomer structures of n-butene dimers are 6 % n-octenes, 59 % 3-methylheptenes, and 34 % 3,4-dimethylhexenes propene-butene codimerization yields the following isomer distribution 12% n-heptenes, 12% 2-methylhexenes, 40% 3-methyl-hexenes and 35 % 2,3-dimethylpentenes. The relative rate constants for codimerization are... 

The relationship between selectivity and conversion can be simulated if rate functions, relative rate constants, and equilibrium constants are known. Fig. 8 shows simulated selectivities to n-heptene and n-hepta-diene for the dehydrogenation of n-heptane. In this simulation, the relative rate constants used are unity, which represents that the catalyst possesses perfect selectivity regarding consecutive dehydrogenation the dehydrogenation rate of paraffin is equal to that of mono-olefin and diolefin. Experimental selectivities obtained over a UOP dehydrogenation catalyst show that the catalyst has >90% selectivity for consecutive dehydrogenation steps, as seen in Fig. 8. 

The initial rates of 1-heptene isomerization and of alkylation were estimated from curves the conversion of 1-heptene into isomers and of n-heptenes into alkylation products plotted as a function of time. To obtain accurate values the experiments were carried out over three different weights of catalysts. 

Figure 5 illustrates the change in the monoheptyltoluene distribution on the more active fam asite sample (HFAU30) as a function of n heptene conversion. At low conversion, Ml is formed with a high selectivity (>90% at zero conversion). The percentages of M2 and Mg increase with conversion at the expense of Mi, which can be related to the increase in the amount of 2-heptenes and 3-heptenes in the heptene mixture (Table 3). 

With n-heptene under the same conditions, n-heptyl-GaCl2 is obtained in 90% yield. At 0°-5°C, cyclohexene gives an exotherm, which furnishes cyclohexyl-GaCl2 quantitatively. At lower T no reaction takes place. The reactivity order is, therefore, the same as for hydroalanation, but the reaction is easier. 

HEPTENE, 1-HEPTENE, or n-HEPTENE (592-76-7) Forms explosive mixture with air (flash point <25°F/—4°C). Reacts violently with strong oxidizers. Incompatible with nitric acid. Flow or agitation of substance may generate electrostatic charges due to low conductivity. 

Solubility in Acetone Cerbon tet. Bensene Ether n>Heptene Ethenol Weter Weter in... 

Kudryavtseva, L. Toome, M. Otsa, E. Liquid-vapor equilibrium in the system n-heptene-1 - n-heptane n-heptyne-1 [Russ]. Eesti NSV Lead. Akad. Toim., Keem. 1981, 30, 147-149. 

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