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This exhaustive reference textual content systematically introduces the elemental theories and experimental equipment of anionic polymerization in addition to the synthesis, research, and features of anionically polymerized items.
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Extra resources for Catalysis and Organic Syntheses
Which was hydrogenated at temperatures of 200"-250"C. The final product was a lactone, as shown in Eq. (30). CH,=CHCOOC,H, + CO + H, c o (CO) [OHCCH,CH,COOC,H,] I H, (0 Lo 1 200°-250"C [ HOCH,CH,CH,COOC,H,] 7 (30) ROY L. 04 mol%; temperature, 80°C. The products of the rhodium-catalyzed hydroformylation were responsive to the reaction temperatures and, to a lesser degree, to the reaction pressure, as shown in Tables XXI-XXII. Catalysis by rhodium-tri-n-butylphosphine resulted in high yields of product containing a marked predominance of the cr-isomer, which is contrary to the trend expected from a steric point of view.
O-Dimethylphenoxy p-Phenylphenoxy p-Chlorophenoxy p-Methoxyphenoxy Temperature ("C) Reaction time (min) which is straight-chain 90 90 I10 90 90 90 90 90 90 225 35 60 50 52 80 70 55 210 71 82 81 86 78 47 85 93 83 a Octene, I12 g ; toluene, 200 ml: 5% RWC, 10 g; R,P. 05 mole; pressure, 80-100 psi l i l H,/CO. Table reprinted with permission from J . Org. Chem. 34, 327 (1969). Copyright by the American Chemical Society. ROY L. PRUETT 26 Information published from several sources about 1970 presented details on both the halide-containing RhCI(CO)(PPh,),- and the hydridecontaining HRh(CO)(PPh,),-catalyzed reactions.
1970). Copyright by Gulf Publishing Company. Solvents were shown to have a marked effect upon the rate of reaction and in some cases to alter the product distribution. Without excess triphenylphosphine, as the polarity and concomitant basicity of the solvent increased, the selectivity of the catalyst also increased. Addition of excess triphenylphosphine to the polar solvent dimethylformamide resulted in a further increase in selectivity as well as a fourfold acceleration in rate. Results obtained in various types of solvents are summarized in Table X X .