Ethylene schematic representation

Figure 7.38. Photocycloaddition of formaldehyde and ethylene. Schematic representation of the surfaces involved in the carbon-oxygen attack as a function of the C,0 distance Rqq and the dihedral angle

Figure 7-18. Schematic representation of the LCAO scheme in a, T-only calculation for ethylene, The AOs

Fig. 25. Schematic representation of imprinting (a) cross-linking polymerization ia the presence of a template (T) to obtain cavities of specific shape and a defined spatial arrangement of functional groups (binding sites. A—C) (b) cross-linked polymer prepared from the template monomer and ethylene...

Fig. 9. Schematic representation of a catalyst for ethylene oxide synthesis (not to scale). The porous support particle consists of microparticles held together...

FIGURE 13.4 Schematic representation of maleic anhydride graft-rich clusters in maleated ethylene-propylene copolymers (EPMs). 

FIGURE 13.11 Schematic representation of ionomers prepared by neutralization of maleated ethylene-propylene copolymer (EPM) with zinc acetate. 

FIGURE 3. Schematic representation of the transition state of the Diels-Alder reaction between butadiene and ethylene... 

Fig. II. (a) Schematic representation of hydrocarbons adsorbed on the [111] plane of platinum. Intersections of the lines of triangular net denote positions of the centers of platinum atoms. (1) Cyclohexane (2) all-cis conformation of cij-l,3,5-hexatriene (3) transoid conformations of cis- and trans-1,3,5-hexatriene (S4). (b) Adsorption configurations of acetylene and ethylene found most probable according to LEED studies 141).

Fig. 2-12 Schematic representation of industrial process for synthesis of poly(ethylene terephthalate). After Ellwood [1967] (by permission of American Chemical Society, Washington, DC).

Figure 5.2 Schematic representation of liquid-phase microdroplet extraction setup. (1) Stir bar (2) sample solution (3) ionic liquid microdroplet (4) polytetrafluoro-ethylene (PTFE) tube (5) septum (6) microsyringe. (Adapted from Liu, J.-R, Chi, Y.-G., Jiang, G.-B., Tai, C., Peng, J.-R, and Hu, J.-T., /. Chromatogr. A, 1026,143-147, 2004.)...

Figure 7 Schematic representation of fraws-l,2-bis(4-pyridyl)ethylene.

An oxychlorination unit, in which recycled hydrogen chloride is reacted with further ethylene feedstock in the presence of catalyst and oxygen, is also employed to generate further quantities of EDC, while excess hydrogen is oxidised to form water. Figure 2 is a schematic representation of the process. The oxychlorination reaction is shown in Figure 3. 

Figure 15 Schematic representation of a possible mechanism for the titanium-catalyzed dimerization of ethylene to 1-butene via a titanacyclopentane intermediate.

Figure 16 Schematic representation of a possible path for ethylene trimerization involving 5- and 7-membered chromacycles.

FIGURE 3-30 Schematic representation of the anionic ring opening polymerization of ethylene oxide. 

Fig. 12. (a) Schematic representation of DQ exchange experiments for elucidation of slow molecular dynamics.45 (b) Calculated (black) and observed (gray) 13C-I3C DQ MAS NMR sideband patterns of crystalline poly(ethylene) yielding the dipolar coupling strength and DQ-DQ exchange sideband patterns for different jump angles. For details, see ref. 45. 

In the preceding discussion of the operation of the tubular reactor polymerization scheme, we stated that the heat of reaction is removed by through-wall heat transfer. What exactly occurs in the vicinity of the wall If the characteristic of the high-pressure (300 bar) naphthalene isobar is interpreted as a schematic representation of the solubility of polyethylene in ethylene at a pressure of 2,700 bar, we can use it to predict that polyethylene will precipitate in the boundary layer near any relatively cold surfaces in the reactor or downstream lines. If the precipitation of polyethylene does occur on these internal surfaces and if it is not appropriately removed, the buildup of the polymer on the wall can result in decreased heat transfer from the hot gas-polymer solution, and the attendant decrease in heat transfer can lead to the runaway reaction that is occasionally encountered in high-pressure polyethylene plants. 

Fig. 1. Schematic representation of types of inductive substituents X in mono-substituted ethylene (after )...

Fig. 4. a) Coordination of an olefin (ethylene) to a transition metal (titanium), schematic representation of the relevant orbitals in the x—y plane of an octahedral complex (empty orbitals are shaded) ... 

Figure 5-16. Schematic representation of chain folding in a poly(ethylene) single crystal (after W.

Figure 7.11 Schematic representation of synergistic donor-acceptor interactions in transition metai complexes with ethylene and plane o-donation (a,), TM CjHj in-plane acetylene ligands and associated symmetry jt -bacl

FIGURE 3.58 Schematic representation of the in situ gelling of poly(ethylene glycol)-peptide and glycosaminoglycan-peptide conjugates by Michael-t5 pe addition. Source Tsurkan et al. [86]. Reproduced with permission from John Wiley Sons. 

Figure 1 Schematic representation of the synthesis of defined SPB In the first step, a PS latex is generated, which is then covered by a thin layer of the photoinitiator 2-[p-(2-hydroxy-2-methylpropiophenone)]-ethylene glycol methacrylate (HMEM) in the second step. Photoinitiation in the presence of water-soluble monomers, such as acrylic acid, leads to polyelectrolyte chains grafted onto the surface of the core particles in the third step. Taken with permission from Ballauff, M. Macromol Chem. Phys. 2003, 204, 220. ...

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