References
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- Falve , J. 1980 . New Synthesis with Carbon Monoxide , 372 New York : Springer-Verlag . For a review:
- Koch , H. and Haaf , W. 1958 . Ann. Chem. , 618 : 251 For instance: product distribution in the carboxylation of 2-methyl-2-butanol [C5-acids, 10, C6-acids, 42, C7-acids, 12, and C11- and higher acids, 36%, respectively]; 1,1-dimethylbutyl formate [C5-and C6-acids, 15, C7-acids, 28, C8- and C9-acids, 14, and C13- and higher acids, 43%, respectively].
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- The concentration of carbon monoxide in various acid systems can be estimated by the absorption amount of carbon monoxide into the system or the evolution amount of carbon monoxide by efficient stirring, CO mol/1-acid: H2SO4-HCO2H with slow stirring (present work), 1.6 − 3.8 × 10−1 at −5 ∼ 20°C; H2SO4-HCO2H with vigorous stirring, 0.9 × 10−3 at 0°C; Cu(CO)+ 3- H2SO4, 3.8 × 10−1 at 30°C; Cu(CO)+ 4- BF3-H2O, 7.2 × 10−1 at 20°C; HF-SbF5 (HF/SbF5 molar ratio, 1), 4.0 × 10−2 at 20°C.
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