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Synthesis of Gold-(I) and -(III) Complexes with Carbonyl-stabilized Phosphorus Ylides. Crystal Structure of 2>ClO4

DOI: 10.1039/DT9850001163

Source and publish data:

Journal of the Chemical Society, Dalton Transactions p. 1163 - 1168 (1985)

Update date:2022-07-29

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Authors:

Vicente, JoseVicente, Jose

Chicote, Maria T.Chicote, Maria T.

Cayuelas, Jose A.Cayuelas, Jose A.

Fernandez-Baeza, JuanFernandez-Baeza, Juan

Jones, Peter G.Jones, Peter G.

et al.et al.

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Article abstract of DOI:10.1039/DT9850001163

Phosphonium salts (Ph3PCH2CO2R)ClO4 (R=Me or Et) react with (acac=acetylacetonate, L'=PPh3 or AsPh3), displacing acac as acetylacetone and yielding cationic complexes of the corresponding phosphorus ylides L (L=Ph3PCHCO2Me, L'=PPh3; L=Ph3PCHCO2Et, L'=PPh3 or AsPh3).These complexes react with to give dinuclear species <(AuL')2<μ-C(PPh3)CO2R>>ClO4 (R=Et, L'=PPh3 or AsPh3; R=Me, L'=PPh3).The displacement of the ligand tetrahydrothiophene (tht) in by the ylides Ph3PCHCO2R (R=Me or Et) forms complexes , which react (i) with chlorine to give or (ii) with L in the presence of NaClO4 to give complexes ClO4, which also react with chlorine to form gold(III) complexes ClO4.The crystal structure of the complex <2<μ-C(PPh3)CO2Et>>ClO4 has been determined: space group P21/c, with a= 18.666(6), b=17.490(5), c=16.413(5) Angstroem, β=95.10(3) deg, and R=0.055.A short Au...Au contact of 2.892(2) Angstroem is observed.

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