%0 Journal Article %1 doi:10.1021/acs.organomet.0c00740 %A Momin, Mohasin %A Musso, Janis V. %A Frey, Wolfgang %A Buchmeiser, Michael R. %D 0 %J Organometallics %K crc1333 crc1333_fp1 %N 0 %P null %R 10.1021/acs.organomet.0c00740 %T Tuning the Latent Behavior of Molybdenum Imido Alkylidene N-Heterocyclic Carbene Complexes in Dicyclopentadiene Polymerization %U https://doi.org/10.1021/acs.organomet.0c00740 %V 0 %X We report the synthesis of O- and N-chelated hexacoordinated molybdenum imido alkylidene N-heterocyclic carbene (NHC) bistriflate and pentacoordinated molybdenum imido alkylidene NHC monotriflate monoalkoxide complexes and their use as thermally latent and in some cases air-stable precatalysts in the ring-opening metathesis polymerization (ROMP) of dicyclopentadiene (DCPD). Introduction of electron-withdrawing and electron-donating groups at the O-chelated alkylidene ligand allowed for the tuning of both the onset temperature of polymerization (Tonset) and the temperature of the exotherm maximum (Texo,max). In addition, N-chelated complexes were synthesized using easily available 2-vinylpyridine or 2-vinyl-N,N-dimethylaniline to yield five-membered and, for the first time, four-membered molybdenum imido alkylidene NHC chelates. With these precatalysts, Tonset and Texo,max could be varied between 52 and 142 °C and between 99 and 174 °C, respectively.

@article{doi:10.1021/acs.organomet.0c00740, abstract = { We report the synthesis of O- and N-chelated hexacoordinated molybdenum imido alkylidene N-heterocyclic carbene (NHC) bistriflate and pentacoordinated molybdenum imido alkylidene NHC monotriflate monoalkoxide complexes and their use as thermally latent and in some cases air-stable precatalysts in the ring-opening metathesis polymerization (ROMP) of dicyclopentadiene (DCPD). Introduction of electron-withdrawing and electron-donating groups at the O-chelated alkylidene ligand allowed for the tuning of both the onset temperature of polymerization (Tonset) and the temperature of the exotherm maximum (Texo,max). In addition, N-chelated complexes were synthesized using easily available 2-vinylpyridine or 2-vinyl-N,N-dimethylaniline to yield five-membered and, for the first time, four-membered molybdenum imido alkylidene NHC chelates. With these precatalysts, Tonset and Texo,max could be varied between 52 and 142 °C and between 99 and 174 °C, respectively. }, added-at = {2021-01-19T13:18:00.000+0100}, author = {Momin, Mohasin and Musso, Janis V. and Frey, Wolfgang and Buchmeiser, Michael R.}, biburl = {https://puma.ub.uni-stuttgart.de/bibtex/2e831a961be2a48acdfebc9edb223c157/dr.ruethlein}, description = {Tuning the Latent Behavior of Molybdenum Imido Alkylidene N‑Heterocyclic Carbene Complexes in Dicyclopentadiene Polymerization}, doi = {10.1021/acs.organomet.0c00740}, eprint = {https://doi.org/10.1021/acs.organomet.0c00740}, interhash = {e6d1bfc9976658cd8748cf4d61913d31}, intrahash = {e831a961be2a48acdfebc9edb223c157}, journal = {Organometallics}, keywords = {crc1333 crc1333_fp1}, number = 0, pages = {null}, timestamp = {2021-01-26T10:09:36.000+0100}, title = {Tuning the Latent Behavior of Molybdenum Imido Alkylidene N-Heterocyclic Carbene Complexes in Dicyclopentadiene Polymerization}, url = {https://doi.org/10.1021/acs.organomet.0c00740}, volume = 0, year = 0 }