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Preparation of Photodegradable Oligomers Containing Metal–Metal Bonds Using ADMET

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Abstract

ADMET was evaluated as a method for preparing organometallic polymers with metal–metal bonds in the main chain. The Cp2Mo2CO4(Ph2P(CH2)6CH=CH2)2 complex was synthesized, and the X-ray crystal structure is reported. The molecule did not undergo ADMET polymerization with Grubbs’ or Schrock’s catalysts. In a control experiment to test if the Ph2P(CH2)6CH=CH2 ligand was interfering with the ADMET reaction, the phosphine was reacted with Grubbs’ 2nd generation catalyst. The dimerized metathesis product Ph2P(CH2)6CH=CH(CH2)6PPh2 was obtained with no observed degradation or deactivation of the catalyst. To test the inherent ADMET reactivity of the Ph2P(CH2)6CH=CH2 ligand when it is bonded to a metal center, the mononuclear cis-Mo(CO)4(Ph2P(CH2)6CH=CH2)2 complex was synthesized and polymerized using Grubbs’ 2nd generation catalyst. These control experiments suggest that the inability of Cp2Mo2CO4(Ph2P(CH2)6CH=CH2)2 to polymerize is not due to electronic effects pertaining to the C=C unit of the Ph2P(CH2)6CH=CH2 ligand. Accordingly, steric effects are implicated in the inability of the Cp2Mo2CO4(Ph2P(CH2)6CH=CH2)2 to polymerize by ADMET.

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Acknowledgments

Acknowledgment is made to the Petroleum Research Fund, administered by the American Chemical Society and to the National Science Foundation (DGE-0231997).

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Authors and Affiliations

  1. Department of Chemistry, University of Oregon, Eugene, OR, 97403, USA

    Ginger V. Shultz, Orion B. Berryman, Lev N. Zakharov & David R. Tyler

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  1. Ginger V. Shultz
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  2. Orion B. Berryman
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  3. Lev N. Zakharov
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  4. David R. Tyler
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Correspondence to David R. Tyler.

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Shultz, G.V., Berryman, O.B., Zakharov, L.N. et al. Preparation of Photodegradable Oligomers Containing Metal–Metal Bonds Using ADMET. J Inorg Organomet Polym 18, 149–154 (2008). https://doi.org/10.1007/s10904-007-9174-8

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  • DOI: https://doi.org/10.1007/s10904-007-9174-8

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