Lithium and sodium beryllium hydrides
- 1 January 1968
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc. A
- p. 628-631
- https://doi.org/10.1039/j19680000628
Abstract
Lithium and sodium beryllium hydrides, M2BeH4(M = Li or Na), are left as insoluble residues when diethylberyllium is evaporated (160–180°) from mixtures of BeCl2+ 4MEt2BeH after removal of MCl. Similar reactions of BeCl2+ 3MEt2BeH give products approximating in composition to MBeH3, but these are believed to consist of M2BeH4+ BeH2 since their X-ray powder patterns contain (with the exception of one weak line in each case) only the lines due to M2BeH4. Sodium beryllium hydride dissolves in methanol to give NaBe(OMe)3,MeOH, and the same product is formed from beryllium and methanolic sodium methoxide. Somewhat similar hydrides, though of less definite composition ca. M1–2BeH2–3, are precipitated when MEt3AlH reacts in solution with Be(OBut)2, EtBeH, or Et2Be. Lithium diethylberyllium hydride crystallises from either as a solvate, LiOEt2Et2BeH, m. p. 33–35°, from which ether can be separated at 35–40° under reduced pressure to give benzene-insoluble LiEt2BeH; at 80° diethylberyllium is lost as well as ether.Keywords
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