2-(DI-TERT-BUTYLPHOSPHINO)BIPHENYL

PRODUCT IDENTIFICATION
CAS NO 224311-51-7

2-(DI-TERT-BUTYLPHOSPHINO)BIPHENYL

EINECS NO.  
FORMULA

C20H27P

MOL WT. 298.40

H.S. CODE

  
TOXICITY  
SYNONYMS

JohnPhos (2-Biphenylyl)di-tert-butylphosphine

SMILES

 

CLASSIFICATION

ORGANOPHOSPHINES /

PHYSICAL AND CHEMICAL PROPERTIES
PHYSICAL STATE

white to off-white powder

MELTING POINT 86 - 88 C
BOILING POINT

 

SPECIFIC GRAVITY  
SOLUBILITY IN WATER  
pH  
VAPOR DENSITY  

NFPA RATINGS

  

AUTOIGNITION

 

REFREACTIVE INDEX

  
FLASH POINT  
STABILITY Stable under ordinary conditions.

APPLICATIONS
Phosphine ligands have the general formula PR3 where R may be aliphatic, alicyclic, aromatic, H and ets.  phosphines donate neutral two electrons or accept to form a coordinate covalent bond with the central metal atom of a coordination complex. Phosphines are excellent ligands for transition metals. A variety of polydentate phosphine transition metal complexes including chiral complexes are synthesized as the very reactive and versatile not only homogeneous and heterogeneous but also stereospecific catalysts. Di-tert-butyl Phosphinous chloride is an useful precursor for phosphine ligand complexes including biaryl and biphenyl phosphines and hindered bidentate phosphines  for the reaction of coupling, C-N, C-C and C-O bond formations. (2-Biphenylyl)di-tert-butylphosphine is an useful ligand used in the synthesis of aromatic amines, Suzuki coupling, intramolecular C-O bond formation from aryl halides and triflates
SALES SPECIFICATION

APPEARANCE

white to off-white powder

ASSAY

97.0% min

MELTING POINT

86 - 88 C

TRANSPORTATION
PACKING  
HAZARD CLASS  
UN NO.  
OTHER INFORMATION
Hazard Symbols: , Risk Phrases: , Safety Phrases: 24/25
GENERAL DESCRIPTION OF PHOSPHINE

Phosphine, also called Hydrogen Phosphide, PH3, is a colourless, poisonous, spontaneously flammable gas, with a disagreeable, garlic-like odour melting point -133.5 C,  boiling point -87.4 C. Phosphine is manufactured by the hydrolysis of metal phosphides, by the electrolysis of phosphorus in the presence of hydrogen, or by the  phosphorus-steam reaction.  Phosphine has the structure of ammonia (NH3) but with phosphorus in place of nitrogen. It is slightly soluble in cold water and soluble in alcohol. Phosphine is less soluble in water than ammonia. Phosphine is used in the synthesis of organophosphines and  phosphonium derivatives and as a dopant in the manufacture of  semiconductors. Aluminium or magnesium phosphide are used as  formulations prepared for fumigation in pest control, and zinc  phosphide is used as a rodenticide. Phophene is a starting material for the preparation of pesticides and flame retardants.  Organophosphines are used as solvents for the extraction and separation processes, flame retardants, and in formulating fumigants and electronics applications of semiconductor manufacturing. Tertiary alkylphosphines  act as chemical intermediate and catalyst in the production of industrial acids, alcohols, flavors & fragrances, and pharmaceuticals. Phosphonium describes a univalent radical, PH4. Quaternary phosphonium salts, obtained from tertiary alkylphosphines with the treatment with alkyl or aromatic halides,  are replacing phase transfer catalysts and biocides functions for quaternary ammonium salts due to more  effective performance and higher thermal stability.  Phosphonium salts are used as epoxy curing agents. A variety of  phosphine transition metal complexes  including chiral  complexes are synthesized  as  the very reactive and versatile homogeneous catalysts and stereospecific as well. Trioctylphosphine is used as a strong reducing agent and polymerization cross-linking catalyst. It is used as an intermediate for phase transfer catalysts and  biocides.