Heptane has 9 isomer , Octane 18 and Decane 75 .
Preparation : - 1 . Wurtz reaction : -
2CH3 CH2Br2Na
Dry ether
CH3 CH2CH2CH3
� Follow mainly free radical mechanism
� An alkaline containing useful in preparing even number of carbon atom � Stepping up reaction Frankland reaction
RX + Zn + Rx
R – R + ZnX2
2 . From Grignard reagent ( RMgX )
RMgX + HOH RMgX + R ' OH RMgX + R ' NH2
RH + Mg ( OH ) X RH + Mg ( OR ') X
RH + Mg ( NHR ') X