Mono-, bi-, and tri-nuclear bis(diphenylphosphino)methane gold complexes. Crystal and molecular structures of [bis(diphenylphosphino)methane]bis(pentafluorophenyl)gold(III) perchlorate and 1,2; 2,3-di-µ-[bis(diphenylphosphino)methane]-1,3-dichlorotrigold(I) chlorotris(pentafluorophenyl)aurate(III)
- 1 January 1983
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc., Dalton Trans.
- No. 8,p. 1679-1685
- https://doi.org/10.1039/dt9830001679
Abstract
Reactions of gold(III) complexes of the types [AuClR2(dppm)] and [AuR3(dppm)](R = C6F5, dppm = bis(diphenylphosphino)methane] with other gold complexes, such as [Au(O3ClO)(PPh3)], [Au(C6F5)(tht)], [AuCl(tht)], or [AuCl3(tht)](tht = tetrahydrothiophene) which contain a readily displaceable ligand (O3ClO– or tht), lead to the formation of cationic binuclear complexes of the types [R2ClAu(dppm)Au(PPh3)]ClO4 and [R3Au(dppm)Au(PPh3)]ClO4 or of neutral ones [R2ClAu(dppm)AuX] and [R3Au(dppm)AuX](R = C6F5, X = Cl or C6F5). Reaction of [AuClR2(dppm)] with AgClO4 gives [AuR2(dppm)]ClO4 which has been structurally identified by X-ray crystallography. The crystals are orthorhombic, space group Pnma, with a= 17.204(4), b= 20.053(4), c= 11.348(2)Å, Z= 4, and R= 0.065 for 3 401 unique observed reflections. Oxidation of [XAu(dppm)AuX](X = Cl or C6F5) with [TlClR2] or TlCl3 leads to the cationic trinuclear complex [ClAu(dppm)Au(dppm)AuCl][AuClR3], whose crystal structure has also been determined : space group P, with a= 12.170(6), b= 14.448(8), c= 23.780(10)Å, α= 101.29(5), β= 90.01 (4), γ= 93.68(4)°, Z= 2, and R= 0.085 for 4 891 unique observed reflections. The cation shows short Au ⋯ Au contacts (ca. 3.1 Å).Keywords
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