Organic compounds exist in which a hydrogen atom, joined to the carbon, acquires acid properties as a result of the proximity of certain functional groupings.

The reactions of organic magnesium compounds are of two kinds - reactions of substitution and reactions of addition.

There are, in fact, very few organic zinc compounds; only the first members of the series, which correspond to the simplest organic radicals, can be prepared without too much difficulty, but they have the disadvantage of being spontaneously inflammable in air and are consequently very dangerous to handle.

In organic chemistry, we have learnt to derive from compounds containing only carbon and hydrogen, i.e. from the hydrocarbons, all other types of combinations, such as alcohols, aldehydes, ketones, acids, etc.

One of the outstanding problems in astronomy today is whether complex organic molecules of hydrogen and carbon, similar to those responsible for life on Earth, are present in the early universe.

I don't believe that a hydrogen economy depends on a carbon economy at all.