Three long-chain alkanes detected by Nasa’s Curiosity rover could be chemical biosignatures that point to a history of past ...

An unsolved challenge in catalysis is the efficient and selective functionalization of simple alkanes and plentiful hydrocarbon feedstocks. One promising approach since the late 1990’s is the use of ...

The rapid disappearance of the amber color of the bromine at room temperature is characteristic of reaction with alkenes. (colorless) (purple) (colorless ...

The longest unbranched chain containing the functional group is the parent molecule, or simply the longest unbranched chain for alkanes. Remember that, the longest chain can go round a bend.

Light alkanes are relatively simple molecules made entirely of carbon and hydrogen, arranged in linear or branching structures. Their oxidized counterparts, which include alcohols, epoxides ...

Alkanes, in contrast, do not have a functional group and are less reactive as a result. Addition reactions occur when one molecule combines with another, forming one large molecule and no other ...

The molecules are known as alkanes, hydrocarbons that combine chains of carbon atoms with hydrogen atoms attached to them. They were found by NASA's Curiosity rover when it drilled into a sample ...

Evidence that proteins bearing allylsulfides undergo cross-metathesis with chosen alkenes in aqueous conditions ... polar triazole ring obtained by azide-alkyne cycloaddition or a nonpolar alkene ...

While the presence of these molecules is not proof of ancient life on Mars, scientists say it shows we could detect chemical signatures of past life, if it ever existed. Scientists have announced ...