20819-54-9

Basic information

• Product Name: Trimethylphosphine selenide
• Synonyms: Trimethylphosphine selenide
• CAS NO: 20819-54-9
• Molecular Formula: C₃H₉PSe
• Molecular Weight: 155.05
• Mol File: 20819-54-9.mol
• Article Data: 10

Chemical Properties

• Melting Point: 140.75°C
• Boiling Point: 145.6°Cat760mmHg
• Flash Point: 41.9°C
• Appearance: /solid
• Density: g/cm³
• Vapor Pressure: 6.07mmHg at 25°C
• CAS DataBase Reference: Trimethylphosphine selenide(CAS DataBase Reference)
• NIST Chemistry Reference: Trimethylphosphine selenide(20819-54-9)
• EPA Substance Registry System: Trimethylphosphine selenide(20819-54-9)

Safety Data

• Hazardous Substances Data: 20819-54-9(Hazardous Substances Data)

Usage

Safety Profile

Poison by intravenous route. When heated to decomposition it emits toxic fumes of POx and Se.

InChI:InChI=1/C3H9PSe/c1-4(2,3)5/h1-3H3

Upstream product

• 554-70-1 triethylphosphine 
• 594-09-2 trimethylphosphane 
• 33152-37-3 tetrakis(trimethylphosphine)cobalt⁽⁰⁾ 
• 120789-32-4 bis(1,5-cyclooctanediylboryl)diselenide 
• 154860-11-4 (((CH₃)3SiNCH₂CH₂)3N)VSe 

Downstream Products

• 676-96-0 Trimethylphosphine oxide 
• 6085-36-5 oleic anhydride 

Relevant articles and documents

A nuclear magnetic resonance study of the binding of trimethylphosphine selenide to cadmium oleate

We report an NMR study on the binding of trimethylphosphine selenide (Se=PMe3) to cadmium oleate (Cd(OA)2) in CDCl3 and toluene-d8. At room temperature in CDCl3, Se=PMe3 binds to Cd(OA)2 in 1:1 ratio with a binding constant of 20 ± 3 as determined by NMR titration. The Cd-bound and free Se=PMe3 are in fast exchange on the NMR time scale at room temperature and gives only one 31P NMR peak. At ca. 190 K, three 31P NMR peaks were observed for a toluene-d8 solution of 1:1 mixture of Cd(OA)2 and Se=PMe3. These three peaks were tentatively assigned to free Se=PMe3 (9.0 ppm), 1:1 (19.5 ppm), and 2:1 complex between Se=PMe3 and Cd(OA)2 (18.8 ppm). (Chemical Equation Presented)

Solution structure of cadmium carboxylate and its implications for the synthesis of cadmium chalcogenide nanocrystals

Diffusion-ordered spectroscopy (DOSY) was used to investigate the solution structure of cadmium carboxylate. The molecular weights of cadmium complexes highly depend on the solvent; the complexes are polymeric in toluene but break up in the presence of polar solvents or coordinating ligands.

Electronically tunable compact trialkylphosphines: SMAPs-bridged bicyclic phosphines

A series of silicon-constrained monodentate trialkylphosphines SMAPs bearing a Si substituent with diverse electronic natures were synthesized. DFT calculations and NMR measurements indicated that these compounds constitute a class of electronically tunab