Reduction-resistant [Au25(cyclohexanethiolate)18]0 with an Icosahedral Au13 Core

Reduction-resistant [Au25(cyclohexanethiolate)18]0 with an Icosahedral Au13 Core

Cyclohexanethiolate-protected gold cluster Au25(c-HT)18 was isolated for the first time as a minor byproduct of [Au23(c-HT)16]−. Single-crystal X-ray structure analysis revealed that Au25(c-HT)18 has an icosahedral Au13 core, in sharp contrast to the face-centered cubic cores in major products such...

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Veröffentlicht in:Chemistry letters 2019-08, Vol.48 (8), p.885-887
Hauptverfasser: Omoda, Tsubasa, Takano, Shinjiro, Tsukuda, Tatsuya
Format: Artikel
Sprache:eng
Schlagworte:
Crystal structure
Crystals
Gold
Icosahedral phase
Single crystals
Steric hindrance
Structural analysis
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Zusammenfassung:Cyclohexanethiolate-protected gold cluster Au25(c-HT)18 was isolated for the first time as a minor byproduct of [Au23(c-HT)16]−. Single-crystal X-ray structure analysis revealed that Au25(c-HT)18 has an icosahedral Au13 core, in sharp contrast to the face-centered cubic cores in major products such as [Au23(c-HT)16]− and Au28(c-HT)20. Au25(c-HT)18 prefers a neutral state to an anionic state, probably because the Au13 core is forced to deform due to the steric hindrance between the c-HT ligands.
ISSN:0366-7022
1348-0715
DOI:10.1246/cl.190306