A New Approach to the Photochemically Controlled Crown Ethers: (Tetramethylcyclobutadiene)cobalt Complexes with Benzo-15-Crown-5 and Dibenzo-18-Crown-6
Тип публикации: Journal Article
Дата публикации: 2008-07-16
scimago Q2
wos Q1
БС1
SJR: 0.676
CiteScore: 5.1
Impact factor: 2.9
ISSN: 02767333, 15206041
Organic Chemistry
Inorganic Chemistry
Physical and Theoretical Chemistry
Краткое описание
The photochemical substitution of benzene in [Cb*Co(C6H6)]+ (Cb* = C4Me4) with benzo-15-crown-5 (1) gives the corresponding π-complex [Cb*Co(η6-C6H4(OCH2CH2OCH2CH2)2O)]+ (2). A similar reaction with dibenzo-18-crown-6 (3) produces cation [Cb*Co(η6-C6H4(OCH2CH2OCH2CH2O)2C6H4)]+ (4). Arene exchange is reversible, and both 1 and 3 can be regenerated by irradiation of 2 and 4 with excess benzene. The reaction of [Cb*Co(C6H6)]+ with 0.5 equiv of 3 gives dinuclear complex [trans-Cb*Co(μ-η6,η6-C6H4(OCH2CH2OCH2CH2O)2C6H4)CoCb*]2+ (5). The structures of cations 4 and 5 were confirmed by X-ray diffraction. The electrochemical behavior of complexes prepared was studied. The sodium-binding ability of cobalt complexes 2, 4, and 5 (determined by NMR titration; Ka = 2500, 800, and 50, respectively) was found to be much smaller than that of the free crown ethers 1 and 3 (Ka = 200 000 and 5 000 000). DFT calculations suggest that this decrease is mainly due to electrostatic repulsion of Co+ and Na+ centers.
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Perekalin D. S. et al. A New Approach to the Photochemically Controlled Crown Ethers: (Tetramethylcyclobutadiene)cobalt Complexes with Benzo-15-Crown-5 and Dibenzo-18-Crown-6 // Organometallics. 2008. Vol. 27. No. 15. pp. 3654-3658.
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Perekalin D. S., Babak M. V., Novikov V. V., Petrovskii P. V., Lyssenko K. A., Corsini M., Zanello P., Kudinov A. R. A New Approach to the Photochemically Controlled Crown Ethers: (Tetramethylcyclobutadiene)cobalt Complexes with Benzo-15-Crown-5 and Dibenzo-18-Crown-6 // Organometallics. 2008. Vol. 27. No. 15. pp. 3654-3658.
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TY - JOUR
DO - 10.1021/om7002688
UR - https://doi.org/10.1021/om7002688
TI - A New Approach to the Photochemically Controlled Crown Ethers: (Tetramethylcyclobutadiene)cobalt Complexes with Benzo-15-Crown-5 and Dibenzo-18-Crown-6
T2 - Organometallics
AU - Perekalin, Dmitry S
AU - Babak, Maria V
AU - Novikov, Valentin V
AU - Petrovskii, Pavel V.
AU - Lyssenko, Konstantin A.
AU - Corsini, Maddalena
AU - Zanello, Piero
AU - Kudinov, Alexander R
PY - 2008
DA - 2008/07/16
PB - American Chemical Society (ACS)
SP - 3654-3658
IS - 15
VL - 27
SN - 0276-7333
SN - 1520-6041
ER -
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@article{2008_Perekalin,
author = {Dmitry S Perekalin and Maria V Babak and Valentin V Novikov and Pavel V. Petrovskii and Konstantin A. Lyssenko and Maddalena Corsini and Piero Zanello and Alexander R Kudinov},
title = {A New Approach to the Photochemically Controlled Crown Ethers: (Tetramethylcyclobutadiene)cobalt Complexes with Benzo-15-Crown-5 and Dibenzo-18-Crown-6},
journal = {Organometallics},
year = {2008},
volume = {27},
publisher = {American Chemical Society (ACS)},
month = {jul},
url = {https://doi.org/10.1021/om7002688},
number = {15},
pages = {3654--3658},
doi = {10.1021/om7002688}
}
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Perekalin, Dmitry S., et al. “A New Approach to the Photochemically Controlled Crown Ethers: (Tetramethylcyclobutadiene)cobalt Complexes with Benzo-15-Crown-5 and Dibenzo-18-Crown-6.” Organometallics, vol. 27, no. 15, Jul. 2008, pp. 3654-3658. https://doi.org/10.1021/om7002688.