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stibine : ウィキペディア英語版
stibine

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Stibine is the chemical compound with the formula SbH3. This colourless gas is the principal covalent hydride of antimony and a heavy analogue of ammonia. The molecule is pyramidal with H–Sb–H angles of 91.7° and Sb–H distances of 1.707 Å (170.7 pm). This gas has an offensive smell like hydrogen sulfide (rotten eggs).
==Preparation==
SbH3 is generally prepared by the reaction of Sb3+ sources with H equivalents:
:2 Sb2O3 + 3 LiAlH4 → 4 SbH3 + 1.5 Li2O + 1.5 Al2O3
:4 SbCl3 + 3 NaBH4 → 4 SbH3 + 3 NaCl + 3 BCl3
Alternatively, sources of Sb3− react with protonic reagents (even water) to also produce this unstable gas:
:Na3Sb + 3 H2O → SbH3 + 3 NaOH

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