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- W2024073431 abstract "The reaction of the digold(I) diacetylide [(AuCCCH2OC6H4)2CMe2] with diphosphane ligands can lead to formation of either macrocyclic ring complexes or [2]catenanes by self-assembly. This gives an easy route to rare organometallic [2]catenanes, and the effect of the diphosphane ligand on the selectivity of self-assembly is studied. With diphosphane ligands Ph2P(CH2)xPPh2, the simple ring complex [Au2[(CCCH2OC6H4)2CMe2](Ph2P(CH2)xPPh2)] is formed selectively when x = 2, but the [2]catenanes [Au2[(CCCH2OC6H4)2CMe2](Ph2P(CH2)xPPh2)]2 are formed when x = 4 or 5. When x = 3, a mixture of the simple ring and [2]catenane is formed, along with the double-ring complex, [Au4[(CCCH2OC6H4)2CMe2]2(Ph2P(CH2)3PPh2)2] and a hexamer Au2[(CCCH2OC6H4)2CMe2](Ph2P(CH2)3PPh2)]6] whose structure is not determined. A study of the equilibria between these complexes by solution NMR techniques gives insight into the energetics and mechanism of [2]catenane formation. When the oligomer [(AuCCCH2OC6H4)2CMe2] was treated with a mixture of two diphosphane ligands, or when two [2]catenane complexes [[Au2[(CCCH2OC6H4)2CMe2](diphosphane)]2] were allowed to equilibrate, only the symmetrical [2]catenanes were formed. The diphosphanes Ph2PCCPPh2, trans-[Ph2PCH=CHPPh2] and (Ph2PC5H4)2Fe give the corresponding ring complexes [Au2[(CCCH2OC6H4)2CMe2](diphosphane)], and the chiral, unsymmetrical diacetylide [Au2[(CCCH2OC6H4C(Me)(CH2CMe2)C6H3OCH2CC)] gives macrocyclic ring complexes with all diphosphane ligands Ph2P(CH2)xPPh2 (x = 2-5)." @default.
- W2024073431 created "2016-06-24" @default.
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- W2024073431 date "2002-02-01" @default.
- W2024073431 modified "2023-10-16" @default.
- W2024073431 title "Self-Assembly of Gold(I) Rings and Reversible Formation of Organometallic [2]Catenanes" @default.
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- W2024073431 doi "https://doi.org/10.1002/1521-3765(20020201)8:3<723::aid-chem723>3.0.co;2-t" @default.
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