Treatment of the dialkyne complex
[{Co2(CO)6}2{μ-η
2∶μ-η2-HOCH2C![[triple bond, length half m-dash]](https://www.rsc.org/images/entities/char_e007.gif)
CC
CCH2OH}] with
HBF4·OEt2 at −78 °C and the
subsequent addition of [HS(CH2)2]2X (X = S
or O) affords the novel macrocyclic complexes
[{Co2(CO)5}{Co2(CO)6
}{(μ-η2-CCCH2SCH
2CH2)2S}] 1a,
[{Co2(CO)6}2{(μ-η
2-CCCH2SCH2CH2)2
O }] 2a and
[{Co2(CO)6}2{(μ-η
2-CCCH2SCH2CH2)2
X}]2 [X = S 1b or O 2b].
The formation of sulfur macrocycles containing dialkyne units
J. E. Davies, L. J. Hope-Weeks, M. J. Mays and P. R. Raithby, Chem. Commun., 2000, 1411 DOI: 10.1039/B003720F
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