CH3SbH2

CH3SbH2, also known as methylstibine, is an organoantimony compound with the chemical formula CH3SbH2. It is a derivative of stibine (SbH3) where one hydrogen atom is replaced by a methyl group (CH3). This compound is a hydride of antimony and is considered a stibine. Its molecular structure features a central antimony atom bonded to one methyl group and two hydrogen atoms. The molecule is expected to have a pyramidal geometry, similar to ammonia and phosphine, due to the lone pair of electrons on the antimony atom.

Methylstibine is a relatively unstable compound. Like other lower alkylstibines and stibine itself, it is expected to be air-sensitive and potentially pyrophoric, meaning it could ignite spontaneously in air. Its reactivity is primarily associated with the antimony-hydrogen bonds, which are weaker than carbon-hydrogen bonds, and the presence of the lone pair on antimony, which can act as a nucleophile. Due to its instability and the potential toxicity of antimony compounds, methylstibine is not commonly encountered or extensively studied. Its synthesis and handling would require specialized laboratory conditions and safety precautions. Information regarding its physical properties, such as melting point or boiling point, is scarce due to its limited availability and instability.