ecneics

Thanks a lot sir , can you give me an example and the synthesis of this alkane ?

excuse me i have a question ( my english is not the best sorry about that ) : sometimes we need to wash some products with toluene and petroleum ether ( in an experiment we read that after filtration , the product need to be washed with toluene and petroleum ether ) , i want to know if there is a synthetic product who can play the role of petroleum ether thanks a lot for your help