[katka1819]

I have a little problem. How get 2-methylpentane from methylacetylene also nonane from 1-butene using only inorganic reagents. I don't have any idea how to start.
Thank for help.

[shalikadm]

In the first problem,think like this,

You have 3 carbon atoms in the first molecule 6 in the second.
Now think of a way to connect those 2 carbon chains together.
Can you see that one of the chains marked red in the second molecule appears like that of a aldehyde/ketone. Now you should think that your conversion must have an intermediate aldehyde/ketone.
So you can do it in two different ways.

In the second problem,take it like this,

Here you have 4 left side and 9 right side. Now you have to add an extra carbon to the chain.
To add an extra carbon you can,

• use CO₂with grignard
• use HCHO with grignard

But if you are give only to use 1- butene only as an organic compound , you have to use CO₂ as it is considered as an inorganic compound.
You can do this conversion with the skill you get from the first problem.

Do it yourself and show what you have tried.

[antimatter101]

Why not try oxymercuration? It gets you started straight away, and you get the answer quite quickly using oxymerc. (For first question only)