Description

9,9-Bis(trifluoromethyl)-2,3,6,7-xanthenetetracarboxylic dianhydride (CAS No. 139162-14-4) is a high-purity fluorinated aromatic dianhydride with the molecular formula C₁₉H₄F₆O₇. This specialized compound features a rigid xanthene core functionalized with two trifluoromethyl groups and four anhydride moieties, offering exceptional thermal stability, chemical resistance, and low dielectric constants. Ideal for advanced polymer synthesis, it serves as a key monomer for high-performance polyimides, polyamides, and other thermally stable resins. With an IUPAC name of 12,12-bis(trifluoromethyl)-2,7,17-trioxapentacyclo[11.7.0.0^3,11.0^5,9.0^15,19]icosa-1(13),3(11),4,9,14,19-hexaene-6,8,16,18-tetrone, it is rigorously tested via HPLC, NMR, and elemental analysis to ensure ≥98% purity. Packaged under inert gas to prevent hydrolysis of anhydride groups.

Properties

• CAS Number: 139162-14-4
• Complexity: 839
• IUPAC Name: 12,12-bis(trifluoromethyl)-2,7,17-trioxapentacyclo[11.7.0.03,11.05,9.015,19]icosa-1(13),3(11),4,9,14,19-hexaene-6,8,16,18-tetrone
• InChI: InChI=1S/C19H4F6O7/c20-18(21,22)17(19(23,24)25)9-1-5-7(15(28)31-13(5)26)3-11(9)30-12-4-8-6(2-10(12)17)14(27)32-16(8)29/h1-4H
• InChI Key: QZAQJDMAOKERBY-UHFFFAOYSA-N
• Exact Mass: 457.98612143
• Molecular Formula: C19H4F6O7
• Molecular Weight: 458.2
• SMILES: C1=C2C(=CC3=C1C(C4=C(O3)C=C5C(=C4)C(=O)OC5=O)(C(F)(F)F)C(F)(F)F)C(=O)OC2=O
• Topological: 96
• Monoisotopic Mass: 457.98612143
• Synonyms: 139162-14-4, 11,11-Bis(trifluoromethyl)-1H-difuro[3,4-b:3′,4′-i]xanthene-1,3,7,9(11H)-tetraone, 6FCDA, SCHEMBL10048596, QZAQJDMAOKERBY-UHFFFAOYSA-N, 9,9-bis(trifluoromethyl)-2,3,6,7-xanthenetetracarboxylic dianhydride, 9,9-Bis(trifluoromethyl)-9H-xanthene-2,3,6,7-tetracarboxylic 2,3:6,7-dianhydride, G75491

Application

This fluorinated dianhydride is primarily used as a monomer for synthesizing high-temperature-resistant polyimides in aerospace and microelectronics, where its trifluoromethyl groups enhance solubility and reduce dielectric constants. It also serves as a precursor for optical materials due to its rigid xanthene backbone and fluorinated aromatic structure. Applications extend to gas separation membranes and advanced composites requiring chemical inertness.

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