Search results
Results from the WOW.Com Content Network
Phosphine is a highly toxic respiratory poison, and is immediately dangerous to life or health at 50 ppm. Phosphine has a trigonal pyramidal structure. Phosphines are compounds that include PH 3 and the organophosphines, which are derived from PH 3 by substituting one or more hydrogen atoms with organic groups. [4] They have the general formula ...
For example, lithium diphenylphosphide is readily methylated with methyl iodide to give methyldiphenylphosphine: LiiP(C 6 H 5) 2 + CH 3 I → CH 3 P(C 6 H 5) 2 + LiI. Phosphine is a precursor to some tertiary phosphines by hydrophosphination of alkenes. For example, in the presence of basic catalysts PH 3 adds of Michael acceptors such as ...
Compounds related to phosphine oxides include phosphine imides (R 3 PNR') and related chalcogenides (R 3 PE, where E = S, Se, Te). These compounds are some of the most thermally stable organophosphorus compounds. In general, they are less basic than the corresponding phosphine oxides, which can adduce to thiophosphoryl halides: [7]: 73
Phosphine (PH 3) and its organic derivatives (PR 3) are structural analogues of ammonia (NH 3), but the bond angles at phosphorus are closer to 90° for phosphine and its organic derivatives. Phosphine is an ill-smelling, toxic gas. Phosphorus has an oxidation number of −3 in phosphine. Phosphine is produced by hydrolysis of calcium phosphide ...
Chemical formula Synonyms CAS number CAgO carbonylsilver: CCl 2 F 2: dichlorodifluoromethane freon-12: 75-71-8 CCl 4: carbon tetrachloride tetrachloromethane: 56-23-5 C(CN) 4: tetracyanomethane: 24331-09-7 CFCl 3: trichlorofluoromethane freon-11: 75-69-4 CFCl 2 CF 2 Cl: chlorotrifluoromethane freon-13: 75-72-9 CHCl 3: chloroform ...
Diphosphane, or diphosphine, is an inorganic compound with the chemical formula P 2 H 4. This colourless liquid is one of several binary phosphorus hydrides. It is the impurity that typically causes samples of phosphine to ignite in air.
Methylphosphine is the simplest organophosphorus compound with the formula CH 3 PH 2, often written MePH 2. It is a malodorous gas that condenses to a colorless liquid. It can be produced by methylation of phosphanide salts: [1] KPH 2 + MeI → MePH 2 + KI
Skeletal formula of a generic diphosphine ligand. R represents a side chain.The phosphine donors are connected by a backbone linker. Diphosphines, sometimes called bisphosphanes, are organophosphorus compounds most commonly used as bidentate phosphine ligands in inorganic and organometallic chemistry.