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The ligand 1,1 .bis[N,N′-(2-diphenylphosphino) amide]ferrocene, Fc(CONHCH2CH2PPh2)2 (L), has been synthesized by reaction of the chioro carbonyl derivative Fc(COCI)2 and the aminophosphine NH2CH2CH2PPh2. The coordination properties towards silver(l), goldQ) and gold(lll) compounds have been explored. Several complexes with the diphosphine acting as bidentate chelating or bridgind ligand have been prepared. Furthermore the dinuclear species [Au2{Fc(CONCH2CH2PPh2)2}] with the ligand coordinated through the phosphorus and the deprotonated amido group have been achieved. [ABSTRACT FROM AUTHOR]

[2-(Me2NCH2)C6H4]HgCl (1) was prepared by reacting HgCl2 with [2-(Me2NCH2)C6H4]Li in diethyl ether. The reactions of 1 with the sodium or ammonium salt of the appropriate thiophosphinato ligand, in 1:1 molar ratio, afford the isolation of [2-(Me2NCH2)C6H4]Hg[S(S)PR2] [R=Me (2), Et (3), Ph (4)], [2-(Me2NCH2)C6H4]Hg[S(O)PPh2] (5) and [2-(Me2NCH2)C6H4]Hg[S(S)P(OiPr)2] (6). The compounds were investigated by IR and multinuclear NMR (1H, 13C and 31P) spectroscopy. The molecular structures of 1 and 4 were determined by single-crystal X-ray diffraction. Due to the strong intramolecular coordination of the N atom of the pendant CH2NMe2 arm [Hg(1)–N(1) 2.764(6) and 2.725(4) A˚ in 1 and 4, respectively] both compounds exhibit a T-shaped (C,N)HgX core in the molecular unit, with almost linear arrangement of the covalent bonds [C(1)–Hg(1)–Cl(1) 176.93(18)° in 1, and C(1)–Hg(1)–S(1) 169.54(16)° in 4]. The crystals of 1 contain discrete monomeric molecules, while the crystals of 4 contain dimer associations built through asymmetric bridging dithiophosphinato ligands [Hg(1)–S(1) 2.3911(16) A˚, Hg(1)⋯S(2a) 3.102(2) A˚], thus resulting in an overall pseudo-trigonal bipyramidal (or seesaw) (C,N)HgS2 core, with the nitrogen atom and the weekly bonded sulfur atom in equatorial positions [N(1)–Hg(1)⋯S(2a) 82.01(10)°]. [Copyright &y& Elsevier]