"Alkanides" isn't a commonly used or recognized term in chemistry. It's likely a misspelling or a term specific to a particular context.

Here are some possibilities:

* Alkyl halides: These are organic compounds containing a halogen atom (like chlorine, bromine, or iodine) bonded to a carbon atom. These are sometimes referred to as haloalkanes.

* Alkalides: These are salts where the anion is an alkali metal atom (like lithium, sodium, or potassium). These are very rare and highly reactive compounds.

* Alkanes: These are saturated hydrocarbons with the general formula C_nH_2n+2. Examples include methane (CH₄), ethane (C₂H₆), and propane (C₃H₈).

If you provide more context about where you encountered the term "alkanides," I might be able to give you a more precise answer.