7787-52-2
7787-52-2 结构式
基本信息
英文别名
Beryllium hydride.beryllium dihydride
Dihydrogen beryllium salt
beryllium(+2) cation: hydrogen(-1) anion
物理化学性质
密度0.650
溶解度reacts with H2O; insoluble in ethyl ether, toluene
形态白色无定形固体
颜色白色
水溶解性reacts slowly with H2O, rapidly with dilute acids evolving H2(g) [MER06]
常见问题列表
Beryllium Compounds
In the mid-1960s, considerable interest in beryllium hydride was generated by its potential use with ammonium perchlorate oxidizer in solid propellants for rockets. Beryllium hydride, BeH2 , was prepared by action of ethereal lithium-aluminum hydride with beryllium chloride. A white powder resulted from which the complete removal of ether was difficult. The hydride is not stable above 125 °C (255 °F), decomposing into beryllium and hydrogen.Beryllium hydride is a three-dimensional polymer, considerably ionic in character and containing Be2+ and H- ions. Alternatively, it may be considered to be an electron-deficient molecule, similar to beryllium chloride and the beryllium alkyls, with hydrogen bridges between the two beryllium atoms (BeH2Be).
Three-dimensional molecule of beryllium hydride