Synthesis of cobalt-containing cyclophanes, and the formation of an unprecedented seven-membered cyclic diyneElectronic supplementary information (ESI) available: crystallographic data for complexes 8 and 11. See http://www.rsc.org/suppdata/nj/b3/b310515f/
Golovko, Vladimir B.; Hope-Weeks, Louisa J.; Mays, Martin J.; McPartlin, Mary; Sloan, Anna M.; Woods, Anthony D.; Golovko Vladimir B.; Department of Chemistry, University of Cambridge; Hope-Weeks Louisa J.; University of California, Lawrence Livermore National Laboratory, Division of Chemistry and Chemical Engineering; Mays Martin J.; Department of Chemistry, University of Cambridge; McPartlin Mary; Department of Health and Human Sciences, London Metropolitan University; Sloan Anna M.; Department of Chemistry, University of Cambridge; Woods Anthony D.; Department of Chemistry, University of Cambridge
Журнал:
New Journal of Chemistry
Дата:
2004
Аннотация:
The acid-catalysed Nicholas reaction of the bis-propargyl complex [{Co2(CO)6(μ-η<sup>2</sup>-HOMe2CC.tbd;Câ )}2] 1 in the presence of a variety of nucleophiles leads in each case to [{Co2(CO)6}2{cyclo-μ-η<sup>2</sup>:μ-η<sup>2</sup>-C(.dbd;CH2)CH2CMe2C.tbd;Câ C.tbd;C}], a complex which contains an unprecedented seven-membered macrocyclic diyne ligand. The reactivity of 1 is compared to that of [{Co2(CO)6}2{μ-η<sup>2</sup>:μ-η<sup>2</sup>-1,4-C6H4(C.tbd;CCMe2OH)2}] which does not cyclise on treatment with nucleophiles but instead gives the expected substitution products.
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