33300-85-5Relevant academic research and scientific papers
Phosphine sulfides as an anchor unit for single molecule junctions
Fukazawa, Aiko,Kiguchi, Manabu,Tange, Satoshi,Ichihashi, Yasunori,Zhao, Qiang,Takahashi, Takuya,Konishi, Tatsuya,Murakoshi, Kei,Tsuji, Yuta,Staykov, Aleksandar,Yoshizawa, Kazunari,Yamaguchi, Shigehiro
, p. 174 - 176 (2011)
Phenylene and biphenyl compounds with dibenzophosphole sulfide (DBPS) as an anchoring group for single molecule junctions were synthesized. The conductance measurements revealed that the phosphine sulfide indeed acts as an anchoring group for Au electrodes. Theoretical calculations including metal electrodes demonstrated that the LUMO level of the DBPS-terminated biphenyl is close to the Au Fermi level, leading to the electron conduction of the AumoleculeAu junction based on the resonance-tunneling mechanism.
Synthesis and structural characterization of a tetraaryldiphosphorus cation and a dialkylphosphonium salt
Johnson, Stephen E.,Knobler, Carolyn B.
, p. 227 - 240 (1996)
The compound 5-chorodibenzophosphole reacts with an equivalent amount or an excess of Al2Cl6 in methylene chloride solution to afford the respective tetraorganodiphosphorus cations [R2P(Cl)PR2][AlCl4] (R2 = o,o′-dibenzophenylato), 1. However, reaction of t-Bu2PCl with an equivalent amount or an excess of Al2Cl6 in CH2Cl2 gives rise to a phosphonium ion, [t-Bu2PCl2][AlCl4] (2) as the major product, while reaction with 0.5 equivalent Al2Cl6 leads to a mixture of cationic organophosphorus species. In addition, the compound 5-chloro-bis-carboranylphosphole (3) was synthesized. Compound 3 fails to react with Al2Cl4 or GaCl3, yet does afford 5-fluoro-bis-carboranylphosphole (4) upon treatment with AgSbF6. The molecular structures of 1 and 2 have been determined from X-ray structural analysis. The former consists of a planar P(III) heterocyclic moiety joined to an essentially tetrahedral P(IV) heterocycle by a single P - P bond. The charge is balanced by the heptachlorodialuminate ion. Compound 1 crystallized in the triclinic space group Pl with a = 10.5798(8) A, b = 11.3656(9) A, c = 13.8190(11) A, α = 107.985(3)°, β = 100.9135(2)°, γ = 103.636(2)°, V = 1478 A3, Z = 2, R = 0.047. Compound 2 crystallized in the monoclinic space group, P2l with a = 7.2471(8) A, b = 12.0235(12) A, c =9.9651(11) A, β = 90.473(3)°, V = 868 A3, Z = 2, R = 0.109.
Coordination chemistry of 2,2′-biphenylenedithiophosphinate and diphenyldithiophosphinate with U, Np, and Pu
Macor, Joseph A.,Brown, Jessie L.,Cross, Justin N.,Daly, Scott R.,Gaunt, Andrew J.,Girolami, Gregory S.,Janicke, Michael T.,Kozimor, Stosh A.,Neu, Mary P.,Olson, Angela C.,Reilly, Sean D.,Scott, Brian L.
, p. 18923 - 18936 (2015/11/11)
New members of the dithiophosphinic acid family of potential actinide extractants were prepared: heterocyclic 2,2′-biphenylenedithiophosphinic acids of stoichiometry HS2P(R2C12H6) (R = H or tBu). The time- and atom-efficient syntheses afforded multigram quantities of pure HS2P(R2C12H6) in reasonable yields (～60%). These compounds differed from other diaryldithiophosphinic acid extractants in that the two aryl groups were connected to one another at the ortho positions to form a 5-membered dibenzophosphole ring. These 2,2′-biphenylenedithiophosphinic acids were readily deprotonated to form S2P(R2C12H6)1- anions, which were crystallized as salts with tetraphenylpnictonium cations (ZPh41+; Z = P or As). Coordination chemistry between [S2P(tBu2C12H6)]1- and [S2P(C6H5)2]1- with U, Np, and Pu was comparatively investigated. The results showed that dithiophosphinate complexes of UIV and NpIV were redox stable relative to those of UIII, whereas reactions involving PuIV gave intractable material. For instance, reactions involving UIV and NpIV generated An[S2P(tBu2C12H6)]4 and An[S2P(C6H5)2]4 whereas reactions between PuIV and [S2P(C6H5)2]1- generated a mixture of products from which we postulated a transient PuIII species based on UV-Vis spectroscopy. However, the trivalent Pu[S2P(C6H5)2]3(NC5H5)2 compound is stable and could be isolated from reactions between [S2P(C6H5)2]1- and the trivalent PuI3(NC5H5)4 starting material. Attempts to synthesize analogous trivalent compounds with UIII provided the tetravalent U[S2P(C6H5)2]4 oxidation product.
TETRAMERISATION OF ETHYLENE
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Page/Page column 30, (2014/12/09)
A process for the tetramerisation of ethylene includes contacting ethylene with a catalyst under ethylene oligomerisation conditions. The catalyst comprises a source of chromium, a ligating compound, and an activator. The ligating compound includes a phosphine that forms part of a cyclic structure.
OLIGOMERISATION OF ETHYLENE TO MIXTURES OF 1-HEXENE AND 1-OCTENE
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Page/Page column 30-31, (2014/12/09)
A process for the otigomerisation of ethylene to predominantly 1-hexene or 1-octene or mixtures of 1-hexene and 1-octene includes contacting ethylene with a catalyst under ethylene oligomerisation conditions. The catalyst comprises a source of chromium, a diphosphine ligating compound, and optionally an activator. The diphosphine ligating compound includes at least one optionally substituted fused cyclic structure including at least two rings, the optionally substituted fused cyclic structure including a 5- to 7- membered aromatic first ring bonded to a phosphorus atom, the aromatic first ring being fused to a 4- to 8-membered heterocyclic second ring, the heterocyclic second ring including a heteroatom which is separated by two ring atoms along the shortest connecting path from the phosphorous atom that is bonded to the first aromatic ring.
