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Triaryl-Like MONO-, BIS-, and TRISKITPHOS Phosphines: Synthesis, Solution NMR Studies, and a Comparison in Gold-Catalyzed Carbon–Heteroatom Bond Forming 5-exo-dig and 6-endo-dig Cyclizations

27-Apr-2016 | Simon Doherty; Julian G. Knight; Daniel O. Perry; Nicholas A. B. Ward; Dror M. Bittner; William McFarlane; Corinne W ..., Organometallics, 2016

A homologous series of triaryl-like KITPHOS-type monophosphines containing one, two, or three bulky 12-phenyl-9,10-dihydro-9,10-ethenoanthracene (KITPHOS) units have been developed, and the influence of increasing steric bulk on their efficacy as ligands in gold(I)-catalyzed carbon–heteroatom ...

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From Binuclear Complexes to Molecular Necklaces: Incorporating Flexible Ligands into Rotaxanes

26-Apr-2016 | Elizabeth Viljoen, Kelong Zhu, Stephen J. Loeb, Chemistry - A European Journal, 2016

Abstract The conversion of binuclear complexes into larger molecular necklaces can be achieved through rigidifying flexible ligands by threading them through a crown ether to form either an interpenetrated [2]pseudorotaxane or a permanently interlocked [2]rotaxane. The resulting complexes and ...

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Highly Active Multidentate Ligand‐Based Alkyne Metathesis Catalysts

26-Apr-2016 | Ya Du, Haishen Yang, Chengpu Zhu, Michael Ortiz, Kenji D. Okochi, Richard Shoemaker, Yinghua Jin, Wei Zhang, Chemistry - A European Journal, 2016

Abstract Alkyne metathesis catalysts composed of molybdenum(VI) propylidyne and multidentate tris(2‐hydroxylbenzyl)methane ligands have been developed, which exhibit excellent stability (remains active in solution for months at room temperature), high activity, and broad functional‐group ...

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Thiopyridazine-Based Copper Boratrane Complexes Demonstrating the Z-type Nature of the Ligand

25-Apr-2016 | Stefan Holler; Michael Tüchler; Ferdinand Belaj; Luis F. Veiros; Karl Kirchner; Nadia C. Mösch-Zanetti, Inorganic Chemistry, 2016

In Z-type ligands the electrons for the coordination bond are formally provided by the metal. They represent an important addition to the much more extensively used L- and X-type σ-donor ligands for the development of transition metal complexes with new reactivities. We report here a new boron ...

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Effect of alkyl chain length of tri-n-alkyl phosphate extractants on the electrochemical behaviour of U(VI) in ionic liquid medium

25-Apr-2016 | Author(s): R. Rama, Alok Rout, K.A. Venkatesan, M.P. Antony, Journal of Electroanalytical Chemistry, 2016

Publication date: 15 June 2016 Source:Journal of Electroanalytical Chemistry, Volume 771 Author(s): R. Rama, Alok Rout, K.A. Venkatesan, M.P. Antony Higher homologs of trialkyl phosphates have been proposed for the separation of U(VI) from fast reactor dissolver solution by liquid – ...

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Solution Structures of Highly Active Molecular Ir Water-Oxidation Catalysts from Density Functional Theory Combined with High-Energy X-ray Scattering and EXAFS Spectroscopy

22-Apr-2016 | Ke R. Yang; Adam J. Matula; Gihan Kwon; Jiyun Hong; Stafford W. Sheehan; Julianne M. Thomsen; Gary W. Brudvig; Rober ..., Journal of the American Chemical Society, 2016

The solution structures of highly active Ir water-oxidation catalysts are elucidated by combining density functional theory, high-energy X-ray scattering (HEXS), and extended X-ray absorption fine structure (EXAFS) spectroscopy. We find that the catalysts are Ir dimers with mono-μ-O cores and ...

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Acyliridium(III) Complexes with PCN Terdentate Ligands Including Imino‐ or Iminium‐Acyl Moieties or Formation of Hydrido from Hydroxyl (Eur. J. Inorg. Chem. 12/2016)

21-Apr-2016 | Itziar Zumeta, Claudio Mendicute‐Fierro, Antonio Rodríguez‐Diéguez, José M. Seco, María A. Garralda, European Journal of Inorganic Chemistry, 2016

The cover picture shows an anionic dihydridoiridium species formed in methanol from a dihydridoirida‐β‐diketone in the presence of KOH and hydrogen release from the dihydrido species upon addition of 2‐aminoalkylpyridines to the solution. Hydrogen is transferred from hydroxyl in the solvent to ...

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Acyliridium(III) Complexes with PCN Terdentate Ligands Including Imino‐ or Iminium‐Acyl Moieties or Formation of Hydrido from Hydroxyl

21-Apr-2016 | Itziar Zumeta, Claudio Mendicute‐Fierro, Antonio Rodríguez‐Diéguez, José M. Seco, María A. Garralda, European Journal of Inorganic Chemistry, 2016

Abstract Invited for the cover of this issue is the group of María A. Garralda at Universidad del País Vasco, San Sebastián, Spain. The cover image shows an anionic dihydridoiridium species formed in methanol from a dihydridoirida‐β‐diketone and hydrogen release from the dihydrido species upon ...

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Identification of Zr(IV)-based architectures generated from ligands incorporating the 2,2[prime or minute]-biphenolato unit

19-Apr-2016 | Chengrui Miao; Georges Khalil; Alain Chaumont; Pierre Mobian; Marc Henry, Dalton Transactions, 2016

The structural identification in solution of the Zr(iv) complexes involving two 2,2-biphenol-based proligands is reported. The proligand L1H2 contains one 2,2-biphenol unit whereas L2H4 incorporates two 2,2-biphenol units linked by a para-phenylene bridge. Diffusion Ordered Spectroscopy (DOSY) ...

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Niobium tetrahalide complexes with neutral diphosphine ligands

19-Apr-2016 | Sophie L Benjamin; Yao-Pang Chang; Andrew L Hector; marek jura; W Levason; Gillian Reid; Gavin B G Stenning, Dalton Transactions, 2016

The reactions of NbCl4 with diphosphine ligands o-C6H4(PMe2)2, Me2PCH2CH2PMe2 or Et2PCH2CH2PEt2 in a 1:2 molar ratio in MeCN solution produced eight-coordinate [NbCl4(diphosphine)2]. [NbBr4(diphosphine)2] (diphosphine = o-C6H4(PMe2)2 or Me2PCH2CH2PMe2) were made similarly from NbBr4. X-ray ...

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