Claims
- 1. A quaternary salt of a dihydroxyaromatic compound, said salt having the molecular formula
- H.sub.3 Q(OA.sup.1 O).sub.2, (I)
- wherein A.sup.1 is a divalent aromatic radical and Q is a monocationic carbon- and nitrogen- or phosphorus-containing moiety.
- 2. A salt according to claim 1 which is a quaternary bisphenolate wherein A.sup.1 is
- --A.sup.2 --Y--A.sup.2 --, (II)
- wherein A.sup.2 is unsubstituted p-phenylene and Y is a single bond or a bridging radical wherein 1-2 atoms separate the A.sup.2 values.
- 3. A bisphenolate according to claim 2 having the molecular structure of a double helix of (OA.sup.2).sub.2 Y moieties linked via hydrogen bonds, with the Q moieties lying outside the double helix.
- 4. A bisphenolate according to claim 2 wherein Q is tetra(C.sub.2-6)alkylammonium or hexa(C.sub.2-6)alkylguanidinium.
- 5. A bisphenolate according to claim 2 wherein Q is tetraethylammonium.
- 6. A bisphenolate according to claim 4 wherein Q is hexaethylguanidinium.
- 7. A bisphenolate according to claim 4 wherein Y is isopropylidene.
- 8. A bisphenolate according to claim 7 having molecular structure of a double helix of bisphenol A moieties linked via hydrogen bonds, with the hexaethylguanidinium cations lying outside the double helix.
- 9. A method for preparing a quaternary salt which comprises contacting a dihydroxyaromatic compound of the formula (HO).sub.2 A.sup.1 with an alkali metal hydroxide and a quaternary salt of the formula Q.sup.+ X.sup.-, wherein A.sup.1 is a divalent aromatic radical, Q is a monocationic carbon- and nitrogen-containing moiety containing 9-34 atoms and X is halide.
- 10. A method according to claim 9 wherein A.sup.1 is
- --A.sup.2 --Y--A.sup.2 --, (II)
- wherein A.sup.2 is unsubstituted p-phenylene and Y is a single bond or a bridging radical wherein 1-2 atoms separate the A.sup.2 values.
- 11. A method according to claim 10 wherein the alkali metal hydroxide is sodium hydroxide.
- 12. A method according to claim 10 wherein X is chloride.
- 13. A method according to claim 10 wherein Q is tetra(C.sub.2-6)alkylammonium or hexa(C.sub.2-6)alkylguanidinium.
- 14. A method according to claim 13 wherein Q is tetraethylammonium.
- 15. A method according to claim 13 wherein Q is hexaethylguanidinium.
- 16. A method according to claim 13 wherein Y is isopropylidene.
CROSS-REFERENCE TO RELATED APPLICATION
This application claims priority from copending provisional application Ser. No. 60/021,750, filed on Jul. 15, 1996.
US Referenced Citations (6)