- The new organometallic polydentate ligand trans-bis(2-(diphenylphosphino) pyrimidine) tricarbonyliron(0) and its mono-, di-and tridentate coordination modes towards mercury(ii) halide/pseudohalide
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A novel organometallic polydentate ligand trans-(CO)3Fe(Ph2Ppym)2 1 has been synthesized from the new phosphine ligand Ph2Ppym (Ph2Ppym = 2-(diphenylphosphino)pyrimidine) and its structure determined
- Li, Song-Lin,Zhang, Zheng-Zhi,Mak, Thomas C.W.
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- COPPER COMPLEXES FOR OPTOELECTRONIC APPLICATIONS
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The invention relates to copper(I) complexes of the formula (A) with X═Cl, Br or I (independently of one another) N*∩E=bidentate ligand, with E=phosphinyl/arsenyl radical of the form R2E (where R=alkyl, aryl, alkoxy, phenoxy, amide); N=imine function. Which is part of an aromatic group selected from pyridyl, pyrimidyl, pyridazinyl, triazinyl, oxazolyl, thiazolyl and imidazolyl, the aromatic group optionally having at least one substituent for increasing the solubility of the copper(I) complex in an organic solvent, and “∩”=at least one carbon atom, which is likewise part of the aromatic group, the carbon atom being located both directly adjacent to the imine nitrogen atom and to the phosphorus or arsenic atom, and also to the use thereof in optoelectronic assemblies, especially in OLEDs.
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Page/Page column 5
(2012/07/28)
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- Gold(I) complexes bearing P∩N-ligands: An unprecedented twelve-membered ring structure stabilized by aurophilic interactions
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The P∩N-ligands Ph2Pqn, 1, Ph2Piqn, 2, Ph 2Ppym, 3, and the As∩N-ligands Ph2Asqn, 4, Ph 2Asiqn, 5, (Ph = phenyl, qn = 8-quinoline, iqn = 1-isoquinoline, pym = 2-pyrimidine) have been synthesized, the ligands 2 and 5 for the first time. Their ligand properties were probed by the synthesis of gold(I) complexes. Reaction with (tht)AuCl (tht = tetrahydrothiophene) yielded the chloro-gold complexes Ph2RP-Au-Cl (R = qn, 6; iqn, 7; pym, 8) and Ph 2RAs-Au-Cl (R = qn, 9; iqn, 10) in high yields. Further treatment of 7 and 8 with one equivalent of AgBF4 provided the complexes [(Ph 2Piqn)Au]BF4, 11, [(Ph2Ppym)Au]BF4, 12, and [(Ph2Piqn)Au(tht)]BF4, 14. For comparison, the previously reported complex [(Ph2Ppy)Au]BF4 (py = pyridine), 13, was re-investigated. The compounds were characterized by elemental analyses, mass spectrometry and NMR spectroscopy. In addition, the solid-state structures of 2, 3, 6, 7, 9-14 have been determined by X-ray crystallography. The chloro-gold compounds crystallize in the common rod-like structure known from R3EAuCl (R = aryl, E = P, As) complexes without further aggregation via aurophilic interactions. In all cases the phosphine acts as a monodentate ligand. In the solid state compounds 11-13 feature an unprecedented cyclic trinuclear aggregation pattern, in which the Au(I) atoms are linearly coordinated by the bridging phosphine ligands forming a cyclic (P-Au-N)3 arrangement. The resulting twelve-membered ring is further stabilized by Au ··· Au interactions. Due to the presence of these Au ··· Au contacts, 11-13 are emissive in the solid state but not in solution.
- Monkowius, Uwe,Zabel, Manfred,Fleck, Michel,Yersin, Hartmut
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scheme or table
p. 1513 - 1524
(2010/07/02)
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- Electrosynthesis of triorganylphosphines from organic halides and chlorophosphines, catalyzed by nickel complexes
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The possibility of cross coupling of organic halides and chlorophosphines under the action of electrochemically generated Ni(0) complexes of 2,2′-bipy is shown. The final triorganylphosphines are formed by several pathways, including reaction of the σ complex of ArNiX with chlorophosphine and electron transfer-induced reductive elimination of Ph2PArNiX, leading to the cross-coupling product.
- Budnikova,Kargin,Sinyashin
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p. 524 - 528
(2007/10/03)
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- Nickel-catalysed electrochemical coupling between mono- or di-chlorophenylphosphines and aryl or heteroaryl halides
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Nickel-catalysed electrochemical cross-coupling between aryl- or heteroaryl-halides and chlorodiphenylphosphine or dichlorophenylphosphine affords tertiary phosphines in good to high yields.
- Budnikova, Yulia,Kargin, Yuri,Nedelec, Jean-Yves,Perichon, Jacques
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- 2-pyrimidylphosphines: A new class of ligands for transition metal catalysis
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The synthesis of 2-pyrimidyldiphenylphosphine (2), bis-2- pyrimidylphenyl-phosphine (3) and tris-2-pyrimidylphosphine (4) is described. Ligand 2 forms cationic complexes with palladium(II) in which four-membered P/N-chelates are involved, leading to a ver
- Reetz, Manfred T.,Demuth, Ralf,Goddard, Richard
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p. 7089 - 7092
(2007/10/03)
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