Leading candidates are lithium hydride, sodium borohydride, lithium aluminium hydride and ammonia borane. Other reducing agents are lithium aluminium hydride and sodium borohydride. Reduction by lithium aluminum hydride yields cycloheptatriene. Common hydrides used are sodium hydride and potassium hydride. These reactions can be effected stoichiometrically using lithium aluminium hydride. The metal reacts with hydrogen gas at high temperatures to produce lithium hydride (LiH). They decompose to form polymeric polysilicon hydride and hydrogen gas. Lactones can be reduced to diols using lithium aluminium hydride in dry ether. In combination with lithium tri-"tert"-butoxyaluminum hydride it cleaves ethers. It can be produced from lithium hydride and aluminium trichloride. Uranium metal heated to reacts with hydrogen to form uranium hydride. Deprotonation of DMSO requires strong bases like lithium diisopropylamide and sodium hydride. The reaction with lithium aluminium hydride (LAH) results in an explosion. By adding small amounts of lithium hydride powder the cold welding can be avoided. This version used nickel metal hydride batteries.