怎么以乙烯为原料合成ch3ch2ch2oh

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怎么以乙烯为原料合成ch3ch2ch2oh

CH2=CH2 + HBr----- CH3CH2Br
CH3CH2Br + Mg----- CH3CH2MgBr
CH3CH2MgBr + HCHO ---- CH3CH2CH2OH

ch2ch2+hcl→ch3ch2cl
ch3ch2cl+mg→ch3ch2mgcl
ch3ch2mgcl+co2→ch3ch2coomgcl
ch3ch2coomgcl+hcl→ch3ch2cooh
ch3ch2cooh+lialh4→ch3ch2ch2oh