US4568494A
Expired / Lapsed
US
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Process for the preparation of TCNQ complexes
Assignee: Bayer AG
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Filing: 1984-09-17
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Granted: 1986-02-04
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Expires: 2004-09-17
Abstract
Abstract This invention relates to a process for the preparation of charge transfer complexes containing 7,7,8,8-tetracyanoquinodimethane by the reaction of TCNQ with organic cation iodides or by the reaction of nitrogen-containing heteroaromatic compounds and tertiary amines with H 2 TCNQ, using smaller quantities of solvent than that required for complete solution of the TCNQ.
Inventors
- 👤 Friedrich Jonas
- 👤 Jurgen Hocker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:13
CPC Classifications
C; C07; C07C; C07C255/00; C07D; C07D217/00; C07D217/02; C07D217/10; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/54; C07F9/5442
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
84 words
In an improved process for the preparation of charge transfer complexes containing 7,7,8,8-tetracyanoquinodimethane, which comprises reacting TCNQ with an organic cation iodide or reacting a nitrogen-containing heteroaromatic compound and a tertiary amine with H 2 TCNQ and TCNQ, the improvement comprises conducting the reaction in the presence of a solvent in an amount less than the quantity required for complete solution of TCNQ and continuously adding TCNQ to the solvent solution at the same rate removed by reaction, along with recycle of the solvent.
Claim 2
Dependent Claim
84 words
In an improved process for the preparation of charge transfer complexes containing 7,7,8,8-tetracyanoquinodimethane, which comprises reacting TCNQ with an organic cation iodide or reacting a nitrogen-containing heteroaromatic compound and a tertiary amine with H 2 TCNQ and TCNQ, the improvement comprises conducting the reaction in the presence of a solvent in an amount less than the quantity required for complete solution of TCNQ and continuously adding TCNQ to the solvent solution at the same rate removed by reaction, along with recycle of the solvent.
Claim 3
Dependent Claim
17 words
A process as claimed in claim 1, wherein the solvent has a boiling point below 100° C.
Claim 4
Dependent Claim
17 words
A process as claimed in claim 1, wherein the solvent has a boiling point below 60° C.
Claim 5
Dependent Claim
27 words
A process as claimed in any one of claims 1 to 3, wherein the quantity of solvent used is at least 10 ml per gram of TCNQ.
Claim 6
Dependent Claim
28 words
A process as claimed in any one of claims 1 to 3, wherein the quantity of solvent used is from 15 to 30 ml per gram of TCNQ.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-02-03 | 1989-08-05 | 1990-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-02-03 | 1993-08-05 | 1994-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-02-03 | 1997-08-05 | 1998-02-04 | $7700.00 | Window Closed / Lapsed |