Heterometallic complexes containing 1,1′-(CC)2Fc′ units linking two different metal centres |
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| Authors: | Michael I. Bruce Paul A. Humphrey Gary J. Perkins Allan H. White |
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| Affiliation: | a School of Chemistry and Physics, University of Adelaide, Adelaide, South Australia 5005, Australia
b Chemistry M313, SBBCS, University of Western Australia, Crawley, Western Australia 6009, Australia |
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| Abstract: | Proto-desilylation of 1-(Me3SiC C)-1′-{Cp∗(dppe)RuCC}Fc′ (1) afforded the corresponding ethynyl derivative 2, from which the green Co2(μ-dppm)n(CO)8−2n (n = 0, 1) adducts 3 and 4 were obtained. Replacement of the ethynyl proton in reactions between 2 and AuCl(PPh3), Hg(OAc)2 or FeCl(dppe)Cp∗ gave complexes 1-(RCC)-1′-{Cp∗(dppe)RuCC}Fc′ [R = Au(PPh3) 5, 1/2Hg 6, Fe(dppe)Cp∗8]; the latter gave bis-vinylidene 9 with MeI, characterised (as was 2) by a single crystal X-ray study. Oxidative coupling of 2 (CuCl/tmeda/acetone, air) gave diyne 10, while coupling of 5 with Co3(μ3-CBr)(μ-dppm)(CO)7 afforded 1-{Cp∗(dppe)RuCC}-1′-{(OC)7(μ-dppm)Co3(μ3-CCC)}Fc′ (11). Cyclic voltammetric measurements indicated that there was no significant electronic coupling between the end-groups through the ferrocene centre in any of these compounds. |
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| Keywords: | Carbon-tricobalt cluster Carbon chains Electronic communication Ferrocene Gold(I) phosphine complexes Ethynyl complexes Ruthenium-phosphine |
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