Claims
- 1. A biscyclobutarene monomer having two cyclobutarene moieties bridged by a divalent radical having at least one azo linkage.
- 2. The biscyclobutarene monomer of claim 1 of the formula: ##STR25## wherein Ar is an aromatic moiety having one valence on each of two adjacent carbon atoms of an aromatic ring;
- each R is independently hydrogen, a monovalent electron-donating moiety, or a monovalent electron-withdrawing moiety; and
- m is an integer of 1 or 2.
- 3. The biscyclobutarene monomer of claim 2 of the formula: ##STR26##
- 4. The biscyclobutarene monomer of claim 1 wherein the azo linkage is a diarylene-substituted azo linkage.
- 5. The biscyclobutarene monomer of claim 4 of the formula: ##STR27## wherein Ar.sup.1 is an aromatic moiety having one valence on each of two adjacent carbon atoms of an aromatic ring;
- Ar.sup.2 is arylene;
- each R is independently hydrogen, a monovalent electron-donating moiety, or a monovalent electron-withdrawing moiety;
- R.sup.1 is a direct bond, oxygen, sulfur, sulfinyl, sulfonyl, carbonyl, vinylene, ethynylene, oxycarbonyl, aminocarbonyl, or fluoroalkylene; and
- m is an integer of 1 or 2.
- 6. The biscyclobutarene monomer of claim 5 of the formula: ##STR28##
Government Interests
The U.S. Government has a paid-up license in this invention and the right in limited circumstances to require the patent owner to license others on reasonable terms as provided for by the terms of Contract No. F33615-85-C-5092 awarded by Wright-Patterson Air Force Base.
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4540763 |
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|
4687823 |
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Aug 1987 |
|
Non-Patent Literature Citations (1)
Entry |
Brand et al, Chemical Abstracts, vol. 29, #2930.sup.9 to 2931.sup.5 (1935). |