СаС2-С2Н2-С2Н4-С2Н5Br-C4H10
CaC2+2H2O=Ca(OH)2+C2H2
C2H2+H2=(Ni)=C2H4
C2H4+HBr=C2H5Br
2C2H5Br +2Na=C4H10 + 2NaBr
CaC2+2H2O=CH---CH+Ca(OH)2 CH---CH+H2=CH2--CH2 CH2--CH2+Br2=CH3-CH2-Br+HBr CH3-CH2-Br+CH3-CH2-Br+Na=2CH3-CH2-CH2-CH2+2NaBr