Four-, five-, or six-membered methanide auracycles: X-ray structure of [(C6F5 )2AuPPh2CH(AuC6F5)PPh 2CHCOOMe]

Article abstract of DOI:10.1021/om00154a010

The complexes [R₂ClAuPPh₂CH₂PPh₂CH ₂COOMe]ClO₄ and [R₂ClAuSPPh₂CH₂PPh₂CH ₂COOMe]ClO₄ (R = C₆F₅) can be deprotonated with AgClO₄, Na₂CO₃, or NaH to synthesize four-, five-, or six-membered auracycles: [R₂AuSPPh₂CHPPh₂CH₂COOMe]ClO ₄, [R₂AuPPh₂CHPPh₂CHCOOMe], [R₂-AuPPh₂CH₂PPh₂CHCOOMe]ClO ₄, or [R₂AuSPPh₂CHPPh₂CHCOOMe]. The methanide C atom in these neutral complexes is a nucleophile and can be used as donor atom to form homodinuclear complexes [R₂Au{SPPh₂(AuX)PPh₂CHCOOMe}] (X = C₆F₅) or [R₂Au{PPh₂CH(AuX)PPh₂CHCOOMe}] (X = Cl, C₆F₅) or heterodinuclear complexes [R₂Au{PPh₂CH(AgPPh₃)PPh ₂CHCOOMe}]ClO₄. The structure of [(C₆F₅)₂Au{PPh₂CH(AuC ₆F₅)PPh₂CHCOOMe}] has been solved by X-ray crystallography. It crystallizes in space group P1 with a = 12.719 (5) ?, b = 12.830 (5) ?, c = 17.918 (7) ?, α = 70.67 (3)°, β = 76.11 (3)°, γ = 72.07 (3)°, and Z = 2.