What are hydrides?
Hydrides, or more likely what you mean is metal hydrides, are compounds containing a metal and an
The hydrogen atom has a significantly higher electronegativity than many transition metals, so we can treat the interaction as a complete electron transfer (i.e. ~100% ionic character).
Some example metal hydrides are:
#"NaH"#(sodium hydride), used in organic chemistry often to remove an #"H"^(+)#from acetylene for reaction with alkyl halides, a #"C"-"C"#bond-making reaction.
#"HCo"("CO")_4#(tetracarbonylhydridocobalt(I)), a trigonal bipyramidal transition metal complex. #"LiAlH"_4#(lithium aluminum hydride), a very strong reducing agent used in organic chemistry. It reacts sufficiently with carboxylic acids, amides, and esters, whereas #"NaBH"_4#(sodium borohydride) would be insufficiently reactive.