A hexanuclear gold carbonyl cluster
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| Authors: | Sonia Martínez-Salvador Larry R. Falvello Antonio Martín Babil Menjón |
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| Affiliation: | a Instituto de Síntesis Química y Catálisis Homogénea (iSQCH) , CSIC – Universidad de Zaragoza , C/Pedro Cerbuna 12 , E-50009 Zaragoza , Spain . Email: ; b Instituto de Ciencia de Materiales de Aragón (ICMA) , CSIC – Universidad de Zaragoza , C/Pedro Cerbuna 12 , E-50009 Zaragoza , Spain |
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| Abstract: | The hexanuclear gold carbonyl cluster [PPh4]2[Au6(CF3)6Br2(CO)2] (4) has been obtained by spontaneous self-assembly of the following independent units: CF3AuCO (1) and [PPh4][Br(AuCF3)2] (3). The cyclo-Au6 aggregate 4, in which the components are held together by unassisted, fairly strong aurophilic interactions (Au···Au ∼310 pm), exhibits a cyclohexane-like arrangement with chair conformation. These aurophilic interactions also result in significant ν(CO) lowering: from 2194 cm–1 in the separate component 1 to 2171 cm–1 in the mixed aggregate 4. Procedures to prepare the single-bridged dinuclear component 3 as well as the mononuclear derivative [PPh4][CF3AuBr] (2) are also reported. |
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