13824-74-3

Basic information

• Product Name: tetrafluorodiphosphane
• Synonyms: phosphorous difluoride;phosphorus tetrafluoride;difluorophosphanyl(difluoro)phosphane
• CAS NO: 13824-74-3
• Molecular Formula: F₄P₂
• Molecular Weight: 137.9411
• Mol File: 13824-74-3.mol
• Article Data: 1

Chemical Properties

• Melting Point: -86.5°C
• Boiling Point: -6.2°C
• CAS DataBase Reference: tetrafluorodiphosphane(CAS DataBase Reference)
• NIST Chemistry Reference: tetrafluorodiphosphane(13824-74-3)
• EPA Substance Registry System: tetrafluorodiphosphane(13824-74-3)

Safety Data

• Hazardous Substances Data: 13824-74-3(Hazardous Substances Data)

Upstream product

• 13497-91-1 diphosphorus tetrachloride 
• 7783-56-4 antimony(III) fluoride 
• 34160-31-1 1,1-Bis(trifluormethyl)-2,2-difluordiphosphan 

Downstream Products

• 7783-55-3 trifluorophosphane 

Relevant articles and documents

The phosphorus-phosphorus bond. II. The preparation and characterization of phosphinodifluorophosphine, H2PPF2, bis(trifluoromethyl)phosphinodifluorophosphine, (CF3)2PPF2, and their borane adducts, H2PPF2·BH3 and (CF3)2PPF2·BH3

Conditions have been found for a high-yield preparation of phosphinodifluorophosphine, H2PPF2, from an excess of PH3 with F2PPF2 in the presence of small amounts of F2PI. Bis(trifluoromethyl)phosphinodifluorophosphine, (CF3)2PPF2, has been prepared with a Wurtz-like coupling of F2PI and (CF3)2PI or by a redistribution reaction involving F2PPF2 and (CF3)2PP(CF3)2. Coordination of BH3 to the PF2 site in both diphosphines is preferred; neither H2PPF2 nor (CF3)2PPF2 was found to coordinate two BH3 groups. The new unsymmetrical diphosphines and their borane adducts have been characterized by nmr (1H, 19F, 31P, and 11B), ir, Raman, mass spectroscopy, and vapor density. The facile vapor-phase dissociation of the borane adducts precluded determination of their vapor pressure curves but such data are given for the parent diphosphines.