Mixed 2-Hexenes

The pure 3-heptene experiments were done on l.OM solutions in pentane. The pure 3-hexene experiments were done on 0.5M solutions in pentane. The mixed hexene and octene experiments were done on pentane solutions which were 0.5M in each olefin. The added aldehyde experiments were done on pentane solutions which were 0.5M in olefin and of varying concentrations of the aldehydes. The ozonides were identified as previously described 11). Ozonide yields were obtained by calibrating the GLPC peak areas with known weights of the ozonides. The elemental analysis of hexene-3 ozonide was previously reported 11). Analyses for heptene-3 and octene-4 ozonide were obtained. 

See Table VIII. Titanium based catalysts dimerize ethylene to 1-butene and codimerize ethylene and 1-butene into mixed hexenes (probably for steric reasons titanium is unable to homodimerize 1-butene or other... 

Two approaches for the synthesis of allyl(alkyl)- and allyl(aryl)tin halides are thermolysis of halo(alkyl)tin ethers derived from tertiary homoallylic alcohols, and transmetalation of other allylstannanes. For example, dibutyl(-2-propenyl)tin chloride has been prepared by healing dibutyl(di-2-propenyl)stannane with dibutyltin dichloride42, and by thermolysis of mixtures of 2,3-dimethyl-5-hexen-3-ol or 2-methyl-4-penten-2-ol and tetrabutyl-l,3-dichlorodistannox-ane39. Alternatively dibutyltin dichloride and (dibutyl)(dimethoxy)tin were mixed to provide (dibutyl)(methoxy)tin chloride which was heated with 2,2,3-trimethyl-5-hexen-3-ol40. 

For example, when a solution of red-brown bromine is mixed with an alkene such as 1-hexene, CH2=CHCH,CH2CH2CH , the color due to bromine is lost as the Br2 molecules attack the double bond to produce CH2Br—CHBrCI I2CI12CI LCFT, (Fig. 2.9). However, benzene does not react with bromine. 

Rytter et al. reported polymerizations with the dual precatalyst system 14/15 in presence of MAO [30]. Under ethylene-hexene copolymerization conditions, 14/MAO produced a polymer with 0.7 mol% hexene, while the 15/MAO gave a copolymer with ca. 5 mol% hexene. In the mixed catalyst system, the activity and comonomer incorporation were approximate averages of what would be expected for the two catalysts. Using crystallization analysis fractionation (CRYSTAF) and differential scanning calorimetry (DSC) analysis, it was concluded in a later paper by Rytter that the material was a blend containing no block copolymer [31],... 

A second set of experiments were performed after the treatment of 10 or 11 with added pyridinium ion whereby the mixed quinuclidine pyridine halonium ion (12) that was created in situ was subsequently treated with a varying [4-penten-l-ol] or [4-hexene-l-ol] in the presence of a varying [pyridine]. Inspection of the process shown in Figure 8 suggests that, once having made 12... 

The C4 Olex process is designed with the full allotment of Sorbex beds in addition to the four basic Sorbex zones. The C4 Olex process employs sufficient operating temperature to overcome diffusion limitations with a corresponding operating pressure to maintain liquid-phase operation. The C4 Olex process utilizes a mixed paraffin/olefin heavy desorbent. In this case it is an olefin/paraffin mix consisting of n-hexene isomers and -hexane. A rerun column is needed to remove heavy feed components such as Cs/C because they would contaminate or dilute the hexene/hexane desorbent. Table 8.5 contains the typical feed and product distributions. 

In another paper from the Jackson Laboratories of the du Pont Company (Calcott et al., 34) there is reported a repetition of some of the reactions of Simons and Archer, as well as additional ones. Mono-, di-, and 1,2,4,5 tetraisopropylbenzene were obtained from propylene and benzene both l -chloro-i-butylbenzene and di-(l/-chloro)-d-butylben-zene were obtained from 3-chloro-2-methyl-propene-l and benzene p-f-butyltoluene and di-i-butyltoluene were obtained from diisobutylene and toluene tetraisopropylnaphthalene was obtained from propylene and naphthalene naphthyl-stearic acid was obtained from oleic acid and naphthalene mixed isopropyltetrahydronaphthalene was obtained from propylene and tetrahydronaphthalene 2,4,6-triisopropylphenol was obtained from propylene and phenol a mixture of monoisopropylated m-cresols was obtained from propylene and wi-cresol and di-(s-hexyl)-diphenyl oxide was obtained from hexene-3 and diphenyl oxide. 

Ojima and co-workers have also extensively studied the catalytic silylformylation of alkynes, employing a number of rhodium and rhodium-cobalt mixed metal complexes.122 The reaction of 1-hexyne with hydrosilanes under either ambient pressure or 10 atm of CO is catalyzed by a variety of metal complexes to yield (Z)-l-silyl-2-formyl-l-hexene, 1, and/or ( )-l-silyl-l-hexene, 2 [Eq. (48)].122a>c... 

It has also been shown that the catalytic activity can be enhanced when appropriate amounts of mixed solvents are present in the oxidation system, compared to a single solvent [98]. In particular, converse results are obtained when the same titanosilicate is used for catalyzing the oxidation of 1-hexene and cyclohexene. Thus, further insight into the solvent effect is required. 

N1 - 3-HEXENE, 3-(p-METHOXYBENZYD-9-(p-METHOXYPHENYL)-, mixed with 9-tp-HETHOXYBENZYL)-3- tp-METHOXYPHENYL)-2-HEXENE (7 3)... 

As mentioned in the above sub-section ( Adsorbed Species ), physisorbed, i,e., weakly bound, species can generally be observed with conventional liquid-state spectrometers. It is important to realise, therefore, that many catalytic reactions which occur via fairly loosely bound species can be perfectly adequately followed by such n.m.r. techniques. The isomerization of alkenes has been reported recently by Nagy etal for but-l-ene to cis- and tnz/is-but-2-ene over mixed Sn-Sb oxide catalysts145 and earlier over zeolites.146 A mechanism has been proposed involving a cyclic intermediate. When the catalyst is NiO/Si02, however, dimerization occurs,147 which in the case of propene leads to a mixture of isomers of hexene, the composition of the mixture depending upon the reaction temperature. 13C-enriched propene was used in this study. 

Description Ethylene feedstream (plus recycle ethylene) and butenes feedstream (plus recycle butenes) are introduced into the fixed-bed, metathesis reactor. The catalyst promotes reaction of ethylene and 2-butene to form propylene and simultaneously isomerizes 1-butene to 2-butene. Effluent from the metathesis reactor is fractionated to yield high-purity, polymerization-grade propylene, as well as ethylene and butenes for recycle and small byproduct streams. Due to the unique nature of the catalyst system, the mixed C4 feed stream can contain a significant amount of isobutylene without impacting performance of the OCT process. A variation of OCT—Automet Technology—can be used to generate ethylene, propylene and the comonomer—hexene-1—by metathesis of n-butenes. 

What products are fonned from reaction of HBr with racemie t M mcthyI 1 hexene Whai can you asy about the relative amounts of ihe wuducu Is the product miX lure opiically active ... 

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