23 research outputs found
Competing metal-metal bonding in heterometallic complexes of gold and mercury. Synthesis of contrasting iron-gold-gold-iron and iron-mercury-iron complexes
No full textTrinuclear osmium and ruthenium clusters containing ligands formed by dehydration and rearrangement of 1,4-dihydroxybut-2-yne
No full textThe first ruthenium-alkyne-dihydride reported is now recognized as an intermediate in the homogeneous hydrogenation of diphenylacetylene: crystal structure of (m-H)2Ru3(CO)9(m3-h2-.dblvert.-C2Ph2)
No full textFormation of diiridium(II) complexes by photoassisted oxidative-addition reactions: Structure of a stable binuclear iodo(iodomethyl)iridium(II) complex
No full textThe diiridium(II) complexes 2 (X = CH3, CH2I) are not intermediates of alkylidene-bridged complexes but are stable compounds. The notable acceleration of the synthesis 1 → 2 by light suggests a radical mechanism, but the formation of a mixture of chloro-, bromo- and iodocomplexes in the synthesis with CH2I2 in the presence of [Bu4N]Br and CH2Cl2 is quite contradictory thereto.Peer reviewe
Ph3P:Se as a convenient synthon for one-step syntheses of Ph3P-substituted selenido carbonyl iron and ruthenium clusters. Crystal structures of Fe3(m3-Se)(m-CO)(CO)7(PPh3)2, M3(m3-Se)2(CO)7(PPh3)2 (M = Fe or Ru) and Ru4(m4-Se)2(m-CO)2(CO)7(PPh3)2
No full textUnexpected formation of a flyover-bridged complex by reaction of a ferrole derivative with Ph2PCH2PPh2 (dppm) and Me2NO. Crystal structure of [Fe2(CO)5(P-dppm)[C2Et2(CO)C2Et2]]
No full textThiocarbonylrhodium complexes with pyrazolate-type ligands
No full textThe first binuclear thiocarbonylrhodium complexes of formula [Rh(μ-L)(CS) (PPh3)]2 (L = pyrazolate type ligand) have been prepared. The crystal structure of the complex with L = 3,5-dimethylpyrazolate has been determined by X-ray diffractometry. Other related mononuclear thiocarbonyl derivatives are also described.Peer reviewe
Metal complexes tethered to a functionalized xerogel containing the benzoylthiourea moiety. Crystal structures of trans[Pd(Hbztu)2Cl2] and [Cu(Hbztu)2Cl] (Hbztu = N-benzoyl-N'-propylthiourea)
No full textSynthesis of mixed-metal trinuclear complexes. X-ray crystal structure of [(cod)2Rh2(μ3-C7H 4NS2)2AgO2ClO2] (cod = cyclo-octa-1,5-diene; C7H4NS2 = benzothiazole-2-thiolate)
No full textThe complex [{Rh(µ2-C7H4NS2)(cod)}2] reacts with compounds of the group 11 metals to give heterotrinuclear complexes, one of which, the title compound, has been characterized by X-ray diffraction methods showing short Rh–Ag separations in a bent arrangement.We thank the C.A.I.C.Y.T. (Spain) for financial supportPeer reviewe
Pyrazolate thiocarbonylrhodium complexes. X-ray structure of [Rh(μ-3,5-Me2Pz)(CS)(PPh3)]2
No full textThe preparation and properties of complexes of general formulae [Rh(CS)-(HL)(PR3)2]ClO4 (HL = pyrazole (HPz), 3-methylpyrazole (H3-MePz), 3,5-dimethylpyrazole (H3,5-Me2Pz), PR3 = triphenylphosphine, tricyclohexylphosphine) and [(PR3)2(CS)Rh(μ-Pz)AuPPh3]ClO4 are reported. Complexes of the first set react with potassium hydroxide to give [Rh(μ-L)(CS)(PPh3)2 or RhPz(CS)(PR3)2 complexes. The structure of the complex [Rh(3,5-Me2Pz)(CS)(PPh3)]2 has been determined by X-ray diffraction methods. The crystals are monoclinic, space group P21/c, with Z = 4 in a unit cell of dimensions a = 12.700(11), b = 17.217(16), c = 23.041(18) Å, β = 116.55(8)°. The structure has been solved by Patterson and Fourier methods and refined by full-matrix least-squares to R = 0.059 for 1978 independent reflections. The structure consists of dimeric complexes, in which each rhodium atom is in a square-planar environment being bonded to a carbon atom of a thiocarbonyl ligand, a phosphorus atom of a triphenylphosphine molecule and to two nitrogen atoms of pyrazolate ligands bridging the metal atoms. The dihedral angle of 71.1° between such two square planes leads to a bent configuration with an intramolecular rhodium-rhodium distance of 3.220 Å. The thiocarbonyl and triphenylphosphine ligands are in a trans disposition.With financial support from the University of Parma.Peer reviewe
