5292-41-1

Upstream product

• 652-12-0 4,5,6,7-tetrafluoroisobenzofuran-1,3-dione 
• 67-56-1 methanol 

Downstream Products

• 5292-42-2 methyl-2,3,4,5-tetrafluoro benzoate 
• 170574-01-3 4-methoxy-3,5,6-trifluorophthalic acid-1-methyl ester 

Relevant academic research and scientific papers

Processes for producing tetrafluorophthalic anhydride and fluorobenzoic acids

A process for producing tetrafluorophthalic anhydride, which comprises chlorinating tetrachlorophthalic anhydride to obtain 3,3,4,5,6,7-hexachloro-1-[3H]-isobenzofuranone, then fluorinating it to obtain 3,4,5,6-tetrafluorophthaloyldifluoride and/or 3,3,4,5,6,7-hexafluoro-1-[3H]-isobenzofuranone, and further reacting the tetrafluorophthalolyldifluoride and/or the hexafluoro-1-[3H]-isobenzofuranone with an inorganic base or an organic acid to obtain tetrafluorophthalic anhydride.

Organolanthanoids. XV The Preparation of Carboxylatobis(cyclopentadienyl)ytterbium(III) Complexes by Oxidation of Bis(cyclopentadienyl)ytterbium(II)

The complexes, Cp2Yb(O2CR) have been prepared in good yield by oxidation of bis(cyclopentadienyl)(1,2-dimethoxyethane)ytterbium(II) with the appropriate mercury(II) or thallium(I) carboxylate, generally in tetrahydrofuran.Structural data suggest that four complexes (R = Me, CF3, Ph or C6F5) are dimeric with bridging bidentate carboxylate groups, three (R = tmp, pyr or quin) are monomeric with chelating carboxylates, but the structure is less clear for R = C6Br5 or tmcp.Unit cell dimensions have been determined for bis(cyclopentadienyl)(2,4,6-trimethylbenzoato)ytterbium(III), but the structure could not be solved owing to decomposition of single crystals in the X-ray beam.