Oligomeric and polymeric species comprising cyclobutane units
AssigneeThe Trustees of Princeton University
InventorsPaul J. Chirik, C. Rose Kennedy, Sarah Tondreau
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Abstract
In one aspect, oligomeric and polymeric species are described herein exhibiting new architectures and associated properties. In some embodiments, such species are synthesized by oligomerization or polymerization of diene monomer via cycloaddition in the presence of a transition metal complex. Oligomers described herein, for example, comprise cyclobutane units in the oligomer backbone. Similarly, a polymers described herein comprise cyclobutane units in the polymer backbone.
Claims34
An oligomer comprising:
- cyclobutane units in the oligomer backbone, wherein the cyclobutane units comprise a mixture of 1,2-cyclobutane and 1,3-cyclobutane.
A polymer comprising:
- cyclobutane units in the polymer backbone, wherein the polymer is entirely aliphatic and wherein the polymer comprises one or more pendant groups comprising alkyl or alkenyl moieties.
A method polymerization comprising:
- providing a reaction mixture including a diene monomer component;
- and
- polymerizing the diene monomer component in the presence of a transition metal complex or derivative thereof to provide a polymer, wherein the transition metal complex is of Formula (I):
- wherein M is selected from the group consisting of iron, cobalt and nickel and wherein R1-R7 are independently selected from the group consisting of hydrogen, alkyl, heteroalkyl, cycloalkyl, heterocycloalkyl, aryl and heteroaryl, wherein the alkyl, heteroalkyl, cycloalkyl, heterocycloalkyl, aryl and heteroaryl are optionally substituted with one or more substituents selected from the group consisting of (C1-C10)-alkyl, (C1-C10)-alkenyl, alkoxy, halo and hydroxyl;
- and wherein L is selected from the group consisting of halo, N2, alkene/diene, carboxylate and CO, and N2 and n is 1 or 2, and
- wherein the polymer comprises cyclobutane units in the polymer backbone.
A polymer comprising:
- cyclobutane units in the polymer backbone, wherein the polymer is entirely aliphatic and the cyclobutane units are separated by one or more methylenes in the polymer backbone.
A polymer comprising:
- cyclobutane units in the polymer backbone, wherein the polymer is entirely aliphatic and the cyclobutane units comprise a mixture of 1,2-cyclobutane and 1,3-cyclobutane.
An oligomer comprising:
- cyclobutane units in the oligomer backbone, and one or more pendant groups comprising alkenyl moieties.
Dependencies are inferred from the claim text.