2253-62-5Relevant academic research and scientific papers
SOME STRUCTURAL CHEMISTRY OF ORGANOLEAD(IV) COMPOUNDS CONTAINING LEAD-SULPHUR BONDS. THE CRYSTAL AND MOLECULAR STRUCTURES OF TRIPHENYLLEAD BENZENETHIOLATE, Ph3PbSPh, TRIPHENYLLEAD O,O'-DIETHYLDITHIOPHOSPHATE, Ph3PbS2P(OEt)2, AND DIPHENYLLEAD BIS(O,O'-DIBENZYLDITHIOPHOSPHATE), Ph2Pb
Begley, Michael G.,Gaffney, Christine,Harrison, Philip G.,Steel, Andrew
, p. 281 - 294 (2007/10/02)
The crystal and molecular structures of three organolead compounds containing lead-sulphur bonds are described.Crystals of triphenyllead benzenethiolate (I, C24H20Pbs) are in the monoclinic space group P21/c, with a 7.657, b 16.427, c 16.239 Angstroem, β 93.781 deg, Z=4; crystals of triphenyllead O,O'-diethyldithiophosphate (II, C22H25O2PPbS2), and diphenyllead bis(O,O'-dibenzyldithiophosphate) (III, C40H38O4PbS4) are both in triclinic space group P, with a 9.579, b 10.602, c 12.710 Angstroem, α 101.623, β 99.554, γ 100.719 deg, Z=2, and a 11.760, b 12.532, c 16.263 Angstroem, α 80.14, β 111.46, γ 112.41 deg, Z=2, respectively.Structures were determined by the heavy atom method using 2820, 2752, and 3084 independent, non-zero reflections with I>3?(I) for compounds I, II and III, respectively, collected using an automated four-circle diffractometer using Mo-Kα radiation (λ 0.71069 Angstroem).The refinements converged at conventional R-values of 3.44percent, 7.40percent and 7.68percent for I, II, and III, respectively.Both Ph3PbSPh and Ph3PbS2(OEt)2 form lattices comprising non-interacting molecules with geometries at lead only slightly distorted from tetrahedral.The distortion in the dithiophosphate is somewhat greater than in the benzenethiolate, and is accompanied by a marginally longer lead-sulphur distance (2.554(6) Angstroem vs. 2.515(2) Angstroem).The lead in Ph2Pb2 are coordinated in a distorted octahedral fashion by two mutually trans phenyl groups (angle CPbC 165.0(9) deg) and two anisobidentate dithiophosphate ligands, each forming one short bond (2.723(6), 2.679(6) Angstroem) and one long bond (2.940(7), 2.957(6) Angstroem) to lead.In the crystal lattice, adjacent pairs of molecules are linked by long (3.69(2) Angstroem) lead-sulphur contacts to give an overall equatorial arrangement.
Begley, Michael G.,Gaffney, Christine,Harrison, Philip G.,Steel, Andrew
, p. 281 - 294 (2007/10/02)
The crystal and molecular structures of three organolead compounds containing lead-sulphur bonds are described.Crystals of triphenyllead benzenethiolate (I, C24H20Pbs) are in the monoclinic space group P21/c, with a 7.657, b 16.427, c 16.239 Angstroem, β 93.781 deg, Z=4; crystals of triphenyllead O,O'-diethyldithiophosphate (II, C22H25O2PPbS2), and diphenyllead bis(O,O'-dibenzyldithiophosphate) (III, C40H38O4PbS4) are both in triclinic space group P, with a 9.579, b 10.602, c 12.710 Angstroem, α 101.623, β 99.554, γ 100.719 deg, Z=2, and a 11.760, b 12.532, c 16.263 Angstroem, α 80.14, β 111.46, γ 112.41 deg, Z=2, respectively.Structures were determined by the heavy atom method using 2820, 2752, and 3084 independent, non-zero reflections with I>3?(I) for compounds I, II and III, respectively, collected using an automated four-circle diffractometer using Mo-Kα radiation (λ 0.71069 Angstroem).The refinements converged at conventional R-values of 3.44percent, 7.40percent and 7.68percent for I, II, and III, respectively.Both Ph3PbSPh and Ph3PbS2(OEt)2 form lattices comprising non-interacting molecules with geometries at lead only slightly distorted from tetrahedral.The distortion in the dithiophosphate is somewhat greater than in the benzenethiolate, and is accompanied by a marginally longer lead-sulphur distance (2.554(6) Angstroem vs. 2.515(2) Angstroem).The lead in Ph2Pb2 are coordinated in a distorted octahedral fashion by two mutually trans phenyl groups (angle CPbC 165.0(9) deg) and two anisobidentate dithiophosphate ligands, each forming one short bond (2.723(6), 2.679(6) Angstroem) and one long bond (2.940(7), 2.957(6) Angstroem) to lead.In the crystal lattice, adjacent pairs of molecules are linked by long (3.69(2) Angstroem) lead-sulphur contacts to give an overall equatorial arrangement.
REDOX REACTIONS OF ANTIMONY(III) O,O-DISUBSTITUTED PHOSPHORODITHIOATES WITH FERRIC CHLORIDE
Woo, Edward J.,Kalbacher, Barbara J.,McEwen, William E.
, p. 269 - 278 (2007/10/02)
The reaction of antimony(III) tris-(O,O-diethylphosphorodithioate) with three equivalents of ferric chloride in ether solution has been found to give ferrous chloride, bis-(O,O-diethylthiophosphoryl) disulfide and dichloroantimony O,O-diethyl phosphorodithioate as the major products.However, a relatively low yield of bis-(O,O-diethylthiophosphoryl) trisulfide was also obtained.The structures of these products were established by independent syntheses.Several additional antimony(III) tris-(O,O-disubstituted phosphorodithioates) were prepared, and the major organic product obtained by reaction of each of these compounds with three equiva lents of ferric chloride was the corresponding bis-(O,O-disubstituted thiophosphoryl) disulfide.A mechanism for this reaction has been suggested, and evidence in support of the mechanism has been presented.The various antimony(III) tris-(O,O-dialkyl phosphorodithioates) are passivating agents in petroleum refining.The results reported in this and in our previous papers indicate that such compounds undergo a variety of reactions with components of crude petroleum prior to the ultimate pyrolysis reactions which occur in the fluid catalytic cracking process.
