Tri- and Tetranuclear Mixed-Metal Clusters Containing Alkyne Ligands: Synthesis and Structure of [Ru3Ir(CO)11(RCCR′)]−, [Ru2Ir(CO)9(RCCR′)]−, and [HRu2Ir(CO)9(RCCR′)]
✍ Scribed by Vincent Ferrand; Georg Süss-Fink; Antonia Neels; Helen Stoeckli-Evans
- Publisher
- John Wiley and Sons
- Year
- 1999
- Tongue
- English
- Weight
- 406 KB
- Volume
- 1999
- Category
- Article
- ISSN
- 1434-1948
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✦ Synopsis
The tetrahedral cluster anion [Ru 3 Ir(CO) 13 ] -(1) reacts with neutral hydrido clusters [HRu 2 Ir(CO) 9 (RCϵCRЈ)] (10: R = RЈ = Ph; 11: R = RЈ = Et; 12: R = Ph; RЈ = Me; 13: R = RЈ = Me). internal alkynes RCϵCRЈ to afford the alkyne derivatives [Ru 3 Ir(CO) 11 (RCCRЈ)] -(2: R = RЈ = Ph; 3: R = RЈ = Et; 4: R = The protonation of the butterfly anions 2 and 3, however, gives rise to the formation of the neutral tetrahedral clusters Ph; RЈ = Me; 5: R = RЈ = Me) which have a butterfly arrangement of the Ru 3 Ir skeleton in which the alkyne is [HRu 3 Ir(CO) 11 (RCCRЈ)] (14: R = RЈ = Ph and 15: R = RЈ = Et), respectively. The analogous clusters [HRu 3 Ir(CO) 11 -coordinated in a µ 4 -η 2 fashion. Under CO pressure they undergo fragmentation to give the trinuclear cluster anions (PhCCCH 3 )] (16) and [HRu 3 Ir(CO) 11 (CH 3 CCCH 3 )] (17) are only accessible from the reaction of the neutral cluster [Ru 2 Ir(CO) 9 (RCCRЈ)] -(6: R = RЈ = Ph; 7: R = RЈ = Et; 8: R = Ph; RЈ = Me; 9: R = RЈ = Me), in which the alkyne ligand is [HRu 3 Ir(CO) 13 ] with the corresponding alkynes. The complexes 2, 4, 5, 6, 10, 12 and 15 are characterised by X-coordinated in a µ 3 -η 2 parallel fashion. Protonation of these trinuclear anions leads to the formation of the corresponding ray structure analysis.