Inorganic Chemistry, volume 48, issue 21, pages 10455-10465
Elucidation of the Structure of a Highly Active Catalytic System for CO2/Epoxide Copolymerization: A salen-Cobaltate Complex of an Unusual Binding Mode
Sung Jae Na
1
,
Sujith S
1
,
Anish Cyriac
1
,
Bo Eun Kim
1
,
Jina Yoo
1
,
Youn-Bae Kang
2
,
Su Cheol Han
3
,
Chongmok Lee
3
,
Bun Yeoul Lee
1
Publication type: Journal Article
Publication date: 2009-09-25
Journal:
Inorganic Chemistry
Quartile SCImago
Q1
Quartile WOS
Q1
Impact factor: 4.6
ISSN: 00201669, 1520510X
Inorganic Chemistry
Physical and Theoretical Chemistry
Abstract
Salen-type ligands comprised of ethylenediamine or 1,2-cyclohexenediamine, along with an salicylaldehyde bearing a methyl substituent on its 3-position and a -[CR(CH(2)CH(2)CH(2)N(+)Bu(3))(2)] (R = H or Me) on its 5-position, unexpectedly afford cobalt(III) complexes with uncoordinated imines. In these complexes, two salen-phenoxys and two 2,4-dinitrophenolates (DNPs), which counter the quaternary ammonium cations, coordinate persistently with cobalt, while two other DNPs are fluxional between a coordinated and an uncoordinated state in THF at room temperature. The complexes of this binding mode show excellent activities in carbon dioxide/propylene oxide copolymerization (TOF, 8300-13,000 h(-1)) but with some fluctuation in induction times (1-10 h), depending on how dry the system is. The induction time is shortened (<1.0 h) and activity is increased approximately 1.5 times upon the replacement of the two fluxional DNPs with 2,4-dinitrophenol-2,4-dinitrophenolate homoconjugation ([DNP...H...DNP](-)). Imposing steric congestion either by replacing the methyl substituent on the salicylaldehyde with tert-butyl or by employing H(2)NCMe(2)CMe(2)NH(2) instead of ethylenediamine or 1,2-cyclohexenediamine results in conventional imine-coordinating complexes, which show lower activities than uncoordinated imine complexes.
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- We do not take into account publications without a DOI.
- Statistics recalculated only for publications connected to researchers, organizations and labs registered on the platform.
- Statistics recalculated weekly.
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Na S. J. et al. Elucidation of the Structure of a Highly Active Catalytic System for CO2/Epoxide Copolymerization: A salen-Cobaltate Complex of an Unusual Binding Mode // Inorganic Chemistry. 2009. Vol. 48. No. 21. pp. 10455-10465.
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Na S. J., S S., Cyriac A., Kim B. E., Yoo J., Kang Y., Han S. C., Lee C., Lee B. Y. Elucidation of the Structure of a Highly Active Catalytic System for CO2/Epoxide Copolymerization: A salen-Cobaltate Complex of an Unusual Binding Mode // Inorganic Chemistry. 2009. Vol. 48. No. 21. pp. 10455-10465.
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TY - JOUR
DO - 10.1021/ic901584u
UR - https://doi.org/10.1021/ic901584u
TI - Elucidation of the Structure of a Highly Active Catalytic System for CO2/Epoxide Copolymerization: A salen-Cobaltate Complex of an Unusual Binding Mode
T2 - Inorganic Chemistry
AU - Na, Sung Jae
AU - S, Sujith
AU - Cyriac, Anish
AU - Kim, Bo Eun
AU - Yoo, Jina
AU - Kang, Youn-Bae
AU - Han, Su Cheol
AU - Lee, Chongmok
AU - Lee, Bun Yeoul
PY - 2009
DA - 2009/09/25 00:00:00
PB - American Chemical Society (ACS)
SP - 10455-10465
IS - 21
VL - 48
SN - 0020-1669
SN - 1520-510X
ER -
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@article{2009_Na,
author = {Sung Jae Na and Sujith S and Anish Cyriac and Bo Eun Kim and Jina Yoo and Youn-Bae Kang and Su Cheol Han and Chongmok Lee and Bun Yeoul Lee},
title = {Elucidation of the Structure of a Highly Active Catalytic System for CO2/Epoxide Copolymerization: A salen-Cobaltate Complex of an Unusual Binding Mode},
journal = {Inorganic Chemistry},
year = {2009},
volume = {48},
publisher = {American Chemical Society (ACS)},
month = {sep},
url = {https://doi.org/10.1021/ic901584u},
number = {21},
pages = {10455--10465},
doi = {10.1021/ic901584u}
}
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Na, Sung Jae, et al. “Elucidation of the Structure of a Highly Active Catalytic System for CO2/Epoxide Copolymerization: A salen-Cobaltate Complex of an Unusual Binding Mode.” Inorganic Chemistry, vol. 48, no. 21, Sep. 2009, pp. 10455-10465. https://doi.org/10.1021/ic901584u.