Electron-rich, the hydride ion (1) should in theory be a base and a nucleophile.
In practice, however, the hydride ion is strongly basic but not nucleophilic. A reagent that, in a reaction, acts as the hydride ion would if it were nucleophilic is called a hydride reagent or hydride equivalent. The most common hydride reagents are the reducing agents sodium borohydride (NaBH4) and lithium aluminumhydride (LiAlH4).
eg:
