Search results
Results from the WOW.Com Content Network
Phosphorus trifluoride (formula P F 3), is a colorless and odorless gas.It is highly toxic and reacts slowly with water. Its main use is as a ligand in metal complexes.As a ligand, it parallels carbon monoxide in metal carbonyls, [1] and indeed its toxicity is due to its binding with the iron in blood hemoglobin in a similar way to carbon monoxide.
Phosphorus oxyfluoride is prepared by partial hydrolysis of phosphorus pentafluoride.. Phosphorus oxyfluoride is the progenitor of the simple fluorophosphoric acids by hydrolysis.
1901, November 4: Pittsburgh Commercial Gazette returns to its historic name, The Pittsburgh Gazette. [98] 1906, March 1: Pittsburgh Sun, evening sister of the morning Post, [99] begins publication. [100] [41] 1906, May 1: George T. Oliver, having acquired the Times, unites it with the Gazette to form The Gazette Times. [101]
The Pittsburgh Post-Gazette, also known simply as the PG, is the largest newspaper serving metropolitan Pittsburgh in the U.S. state of Pennsylvania.Descended from the Pittsburgh Gazette, established in 1786 as the first newspaper published west of the Allegheny Mountains, the paper formed under its present title in 1927 from the consolidation of the Pittsburgh Gazette Times and The Pittsburgh ...
Main page; Contents; Current events; Random article; About Wikipedia; Contact us; Pages for logged out editors learn more
In early work, phosphine ligands were thought to utilize 3d orbitals to form M-P pi-bonding, but it is now accepted that d-orbitals on phosphorus are not involved in bonding. [9] The energy of the σ* orbitals is lower for phosphines with electronegative substituents , and for this reason phosphorus trifluoride is a particularly good π-acceptor.
The Federal Register is the official publication of the United States government for publishing presidential decrees and the like for public notice.. A government gazette (also known as an official gazette, official journal, official newspaper, official monitor or official bulletin) is a periodical publication that has been authorised to publish public or legal notices.
Phosphorus pentafluoride is a Lewis acid.This property is relevant to its ready hydrolysis. A well studied adduct is PF 5 with pyridine.With primary and secondary amines, the adducts convert readily to dimeric amido-bridged derivatives with the formula [PF 4 (NR 2)] 2.