Acyclic diene metathesis

Acyclic diene metathesis or ADMET is a special type of olefin metathesis used to polymerize certain terminal dienes to polyenes:

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The new double bonds formed can be in cis- or trans-configuation.

It is a type of step growth condensation reaction whereas the other metathesis reaction, ring-opening metathesis polymerization is a chain-growth polymerization.

ADMET was introduced by K. B. Wagener in 1991 ^[1]. He successfully polymerized 1,5-hexadiene to polybutadiene with 70% trans double bonds and Weight average molar mass of 28000.

ADMET has been applied in the synthesis of new supramolecular structures ^[2].

References

^ Acyclic diene metathesis (ADMET) polymerization K. B. Wagener, J. M. Boncella, and J. G. Nel Macromolecules; 1991; 24(10) pp 2649 - 2657; doi:10.1021/ma00010a001 10.1021/ma00010a001
^ Template-Directed One-Step Synthesis of Cyclic Trimers by ADMET Hongyi Hou, Ken C.-F. Leung, Daniela Lanari, Alshakim Nelson, J. Fraser Stoddart, and Robert H. Grubbs J. Am. Chem. Soc.; 2006; 128(48) pp 15358 - 15359; (Communication) doi:10.1021/ja065572j