Abstract
Abstract Steric and/or electronic factors preclude the direct coupling of two CCO 3 Cp 3 C units via the carbyne cap by classical alkyne-coupling procedures but the compounds [Me 3 SiCCo 3 (Cp) 3 C(CC) n ] 2 , n = 1, 2, have been prepared from appropriate alkynes Me 3 SiCCo 3 (Cp) 3 C(CC) n H. The crystal structure of [Me 3 SiCCo 3 (Cp) 3 C(CC)] 2 has been determined by X-ray diffraction. Compared with clusters with only one CCo 3 Cp 3 C unit per molecule, compounds with two units per molecule display intense colours and electrochemical responses indicative of electronic interaction between the redox centres via the alkyne chain.
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