News from European Journal of Inorganic Chemistry

EurBest in EurJIC: Stabilized Germylenes Based on Diethylenetriamines and Related Diamines: Synthesis, Structures, and Chemical Properties

2012-10-31T00:00:00+01:00

A series of novel, low-valent germanium compounds have been obtained by the reaction of Ge[N(SiMe₃)₂]₂ with various diamines or by the metathesis reaction of [GeCl2⋅dioxane] with lithium amides. The oxidative insertion, [1+4] cycloaddition, and oxidation reactions of the synthesized germylenes were investigated. All the synthesized germylenes are monomeric.

Mengmeng Huang, Marina M. Kireenko, Kirill V. Zaitsev, Yuri F. Oprunenko, Andrei V. Churakov, Judith A. K. Howard, Elmira Kh. Lermontova, Denis Sorokin, Thomas Linder, Jörg Sundermeyer, Sergey S. Karlov and Galina S. Zaitseva
DOI: 10.1002/ejic.201200363

EurBest in EurJIC: Tellurium–Nitrogen π-Heterocyclic Chemistry – Synthesis, Structure, and Reactivity Toward Halides and Pyridine of 3,4-Dicyano-1,2,5-telluradiazole

2012-10-31T00:10:00+01:00

3,4-Dicyano-1,2,5-telluradiazole and its adducts with pyridine, chloride, and bromide ions have been isolated, and the supramolecular structures investigated by X-ray crystallography.

Nikolay A. Semenov, Nikolay A. Pushkarevsky, Jens Beckmann, Pamela Finke, Enno Lork, Rüdiger Mews, Irina Yu. Bagryanskaya, Yuri V. Gatilov, Sergey N. Konchenko, Vladimir G. Vasiliev and Andrey V. Zibarev
DOI: 10.1002/ejic.201200376

EurBest in EurJIC: Zn-Mediated Synthesis of 3-Substituted Indoles Using a Three-Component Reaction Approach

2012-10-19T00:00:00+02:00

The Zn(salphen)-mediated synthesis of 3-substituted indoles by using a multicomponent reaction approach is reported. The reaction parameters were investigated and the selectivity for the 3-CR product was examined under various conditions. Selectivity for the target compound is significantly compromised by side-product formation due to in situ reaction of the intermediate species with malononitrile, which affords N-heterocyclic structures.

Daniele Anselmo, Eduardo C. Escudero-Adán, Marta Martínez Belmonte and Arjan W. Kleij
DOI: 10.1002/ejic.201200150

EurBest in EurJIC: The Trifluoromethyl Group in Transition Metal Chemistry

2012-10-19T00:10:00+02:00

Definitely different: As the chemistry of trifluoromethylTM derivatives continues to develop, it becomes clearer that methyl and trifluoromethyl ligands (CH3 vs. CF3) exhibit more differences than similarities in their chemical behavior.

M. Angeles García-Monforte, Sonia Martínez-Salvador and Babil Menjón
DOI: 10.1002/ejic.201200620

EurBest in EurJIC: Transition-Metal Complexes Containing the Dinucleating Tetra-N-Dentate 3,5-Bis(2-pyridyl)pyrazole (Hbpp) Ligand – A Robust Scaffold for Multiple Applications Including the Catalytic Oxidation of Water to Molecular Oxygen

2012-10-09T00:00:00+02:00

A large diversity of transition-metal complexes bearing the dinucleating tetra-N-dentate ligand 3,5-bis(2-pyridyl)pyrazole (Hbpp) is described. Their applications in the field of catalysis as hydrogen-transfer, epoxidation, and water-oxidation catalysts are highlighted. Further, their applications in fundamental coordination chemistry are also discussed.

Jordi García-Antón, Roger Bofill, Lluís Escriche, Antoni Llobet and Xavier Sala
DOI: 10.1002/ejic.201200661

EurBest in EurJIC: Crystalline Iron Oxohalide Nanotube Pea Pods

2012-10-09T00:10:00+02:00

Isostructural compounds Fe₇Sb₃(PO₄)₃O₆Cl₃ and Fe₇Sb₃(PO₄)₃O₆Br₃ are the first iron phosphates containing Sb^III. Tubular Fe₇(PO₄)₃O₆X₃ units (X = Cl, Br) are linked by SbO₄ groups to build up a 3D framework. The Fe atoms are arranged to resemble an armchair-type (3,3) nanotube.

Iwan Zimmermann, Mats Johnsson and Sven Lidin
DOI: 10.1002/ejic.201200205

EurBest in EurJIC: PtII and PdII Complexes with a trans-Chelating Bis(pyridyl) Ligand

2012-09-18T00:00:00+02:00

Pd^II and Pt^II complexes containing a trans-chelating bis(pyridyl) ligand bpib have been synthesised. The catalytic reactivity of bpib in Pd^II for arene acetoxylation has been examined and compared with that of 2,2'-bipy.

Nan Wang, Theresa M. McCormick, Soo-Byung Ko and Suning Wang
DOI: 10.1002/ejic.201200442

EurBest in EurJIC: Synthesis and Characterization of a (μ-η2:η2-Peroxido)dicopper(II) Complex with N,N',N''-Triisopropyl-cis,cis-1,3,5-triaminocyclohexane (R3TACH, R = iPr): Selective Preparation of (μ-η2:η2-Peroxido)dicopper(II) and Bis(μ-oxido)dicopper(III) Species Regulated by Substituent Groups

2012-09-18T00:10:00+02:00

The selective preparation of (μ-η²:η²-peroxido)dicopper(II) and bis(μ-oxido)dicopper(III) species is regulated by the substituent groups of triaminocyclohexane derivative ligands. Their structural and spectroscopic features and reactivity are discussed.

Jun Matsumoto, Yuji Kajita and Hideki Masuda
DOI: 10.1002/ejic.201200228

EurBest in EurJIC: The Simple Synthesis of Ferrocene Ligands from a Practitioner's Perspective

2012-09-11T00:00:00+02:00

An overview is given on the synthesis of key precursors for use as ligands or building blocks in ferrocene chemistry. The review is a personal account detailing the reasons for synthetic routes that have been developed over 30 years. The focus is on the preparation of ferrocenylphosphanes; however, also included is a section on the preparation of compounds as precursors for material science.

Ian R. Butler
DOI: 10.1002/ejic.201200540

EurBest in EurJIC: Spectroscopy and Photophysics in Cyclometalated RuII–Bis(bipyridyl) Complexes

2012-09-11T00:10:00+02:00

Cyclometalated Ru^II coordination compounds of the general formula [Ru(bpy)₂(C∧N)]PF₆ {C∧N = 2-phenylpyridine (1), 2-(2,4-difluorophenyl)pyridine (2), 2-(4-methoxyphenyl)-5-methylpyridine (3), benzo[h]quinoline (4); bpy = 2,2'-bipyridine} have been synthesized, structurally and electrochemically characterized, and examined with spectroscopic techniques including ultrafast transient absorption.

Maria L. Muro-Small, James E. Yarnell, Catherine E. McCusker and Felix N. Castellano
DOI: 10.1002/ejic.201200460

EurBest in EurJIC: Cavity Effect on Perrhenate Recognition by Polyammonium Cages

2012-09-04T00:00:00+02:00

The outstanding affinity of receptor 1H₆⁶⁺ towards ReO₄, in an acidic water solution, opens new perspectives for the development of selective materials for the extraction and recovery of the perrhenate anion for clinical and environmental purposes. The formation of an inclusion complex, [1H₆(ReO₄)](CF₃SO₃)₅, is confirmed by X-ray diffraction studies.

Valeria Amendola, Giancarla Alberti, Greta Bergamaschi, Raffaela Biesuz, Massimo Boiocchi, Stefania Ferrito and Franz-Peter Schmidtchen
DOI: 10.1002/ejic.201200334

EurBest in EurJIC: Antiproliferative Activity of PtII Complexes with Carboxylated Phosphanes in Chelated or Ring-Opened Forms

2012-08-29T00:00:00+02:00

The biological activity of four cisplatin-like Ptphosphane complexes has been tested. Some of the complexes can undergo intramolecular rearrangement by virtue of the functionalized phosphanes (fully opened/fully closed forms). The results show that only the opened forms exhibit moderate activity, which is substantially retained in the cisplatin-resistant cell lines.

Mauro Ravera, Elisabetta Gabano, Manuele Sardi, Elena Monti, Marzia B. Gariboldi and Domenico Osella
DOI: 10.1002/ejic.201200282

EurBest in EurJIC: Coordination-Like Chemistry of Phosphinidenes by Phosphanes

2012-08-29T00:10:00+02:00

The coordination chemistry of neutral phosphane adducts of phosphinidenes (phosphanylidene-σ⁴-phosphoranes, also known as phospha-Wittig reagents, RP=PR₃) is reviewed.

John D. Protasiewicz
DOI: 10.1002/ejic.201200273

EurBest in EurJIC: pH-Dependent Imidazolato Bridge Formation in Dicopper Complexes: Magnetic, Electrochemical, and Catalytic Repercussions

2012-08-21T00:00:00+02:00

The dicopper complexes of two dinucleating ligands undergo a strong antiferromagnetic coupling upon formation of an imidazolato bridge. UV/Vis and EPR spectroscopy as well as electrochemical studies confirmed the potentiometric solution speciation.

Inés Monte-Pérez, Ana M. Sosa, Sylvain Bernès, Núria Aliaga-Alcalde, Víctor M. Ugalde-Saldívar and Laura Gasque
DOI: 10.1002/ejic.201200167

EurBest in EurJIC: Studies of the Electronic Properties of N-Heterocyclic Carbene Ligands in the Context of Homogeneous Catalysis and Bioorganometallic Chemistry

2012-08-21T00:10:00+02:00

Towards understanding the key attributes that define the influence of N-heterocyclic carbenes on catalysis, our efforts, involving combined experimental and computational approaches, in looking into a variety of catalytic and biomedical applications of these compounds are summarized.

Anuj Kumar and Prasenjit Ghosh
DOI: 10.1002/ejic.201200622

EurBest in EurJIC: Layered Hydroxide–Porphyrin Hybrid Materials: Synthesis, Structure, and Properties

2012-08-14T00:00:00+02:00

We provide a comprehensive overview of the synthesis and structural alignment of bulky porphyrin molecules in the interlayer space of layered hydroxideporphyrin hybrids. Emphasis is placed on the spectral and photophysical properties of intercalated porphyrins and phthalocyanines for photobactericidal purposes, catalysis, and sensing.

Jan Demel and Kamil Lang
DOI: 10.1002/ejic.201200400

EurBest in EurJIC: Luminescence of ortho-Metalated Iridium Complexes Encapsulated in Zeolite Supercages by the Ship-in-a-Bottle Method

2012-08-14T00:10:00+02:00

Iridiumcarbon sigma bond formation in supercages of faujasite-type zeolites is achieved by using a microwave-assisted ship-in-a-bottle synthesis. The successive reaction of Ir^III cations in the zeolite with two ligands leads to two types of complexes in the different supercages, and the emission from these Ir^III complexes can be tuned in a range from blue to green.

Chen Xu, Dai Mochizuki, Yuta Hashimoto, Takehisa Honda, Yasunori Tsukahara, Tomohisa Yamauchi and Yuji Wada
DOI: 10.1002/ejic.201200116

EurBest in EurJIC: A Comparative Study of Tricarbonylmanganese Photoactivatable CO Releasing Molecules (PhotoCORMs) by Using the Myoglobin Assay and Time-Resolved IR Spectroscopy

2012-08-07T00:00:00+02:00

CO-releasing molecules are interesting therapeutic agents that can deliver and release CO upon stimulation. Light triggers the release of CO in different complexes [LMn(CO)₃]⁺, where L is an N,N,N ligand. Although different amounts of CO released per complex are observed by myoglobin assay, IR spectroscopic investigation of their solutions indicates loss of all CO ligands.

Wilhelm Huber, Rolf Linder, Johanna Niesel, Ulrich Schatzschneider, Bernhard Spingler and Peter C. Kunz
DOI: 10.1002/ejic.201200115

EurBest in EurJIC: Rhenium(I) and Technetium(I) Tricarbonyl Complexes with [NSO]-Type Chelators: Synthesis, Structural Characterization, and Radiochemistry

2012-08-07T00:10:00+02:00

fac-[Re(NSO)(CO)₃] complexes were synthesized with varying chelate ring size and geometry. The order of complex formation preference is: linear (6,5-membered rings) > tripodal (6,5,7-membered rings) > linear (two six-membered rings). The analogous fac-[^99mTc(NSO)(CO)₃] complexes were prepared in high yield and were stable in solution.

George Makris, Ourania Karagiorgou, Dionysia Papagiannopoulou, Angeliki Panagiotopoulou, Catherine P. Raptopoulou, Aris Terzis, Vassilis Psycharis, Maria Pelecanou, Ioannis Pirmettis and Minas S. Papadopoulos
DOI: 10.1002/ejic.201200056

EurBest in EurJIC: Heterogeneous Bifunctional Metal/Acid Catalysts for Selective Chemical Processes

2012-07-31T00:00:00+02:00

Heterogeneous bifunctional catalysts containing metal and acid sites have great potential for the development of greener production processes, particularly for the preparation of fine chemicals. This review highlights the recent advancements and the most representative examples in the field.

Pierluigi Barbaro, Francesca Liguori, Noemi Linares and Carmen Moreno Marrodan
DOI: 10.1002/ejic.201200529

EurBest in EurJIC: A Bombesin Copper Complex Based on a Bifunctional Cyclam Derivative

2012-07-31T00:10:00+02:00

A new bombesin copper complex based on a bifunctional cyclam derivative was synthesized, characterized, and evaluated for its binding affinity to bombesin receptors through in vitro cell assays with PC-3 cells.

Christos C. Liolios, Christos Zikos, Eirini Fragogeorgi, Dimitra Benaki, Maria Pelecanou, Ioannis Pirmettis, Nikolaos Ioannidis, Yiannis Sanakis, Catherine P. Raptopoulou, Vassilis Psycharis, Aris Terzis, Frédéric Boschetti, Minas S. Papadopoulos, Gregory Sivolapenko and Alexandra D. Varvarigou
DOI: 10.1002/ejic.201200049

EurBest in EurJIC: Developments in the Coordination Chemistry of Europium(II)

2012-07-24T00:00:00+02:00

This review describes Eu²⁺-containing complexes reported in the 21st century with focus on the synthesis, reactivity, and application of these complexes.

Joel Garcia and Matthew J. Allen
DOI: 10.1002/ejic.201200159

EurBest in EurJIC: Titration of Zr3(μ-OH) Hydroxy Groups at the Cornerstones of Bulk MOF UiO-67, [Zr6O4(OH)4(biphenyldicarboxylate)6], and Their Reaction with [AuMe(PMe3)]

2012-07-24T00:10:00+02:00

Thermally stable MOF UiO-67, [Zr₆O₄(OH)₄(bpdc)₆], is well-behaved chemically in the bulk: Cornerstone (μ₃-OH) hydroxy groups react quantitatively with MeMgBr with stoichiometric release of methane. Post-synthetic modification with [AuMe(PMe₃)] results in partial covalent grafting of the Au_I center onto the cornerstone hydroxy groups.

Cherif Larabi and Elsje Alessandra Quadrelli
DOI: 10.1002/ejic.201200033

EurBest in EurJIC: Metal Complexation of a D-Ribose-Based Ligand Decoded by Experimental and Theoretical Studies

2012-06-26T00:00:00+02:00

A new sugar-derived ligand, with its coordination site embedded in a pyranoside cycle in the chair conformation, has been designed. Its transition-metal complexes were characterized by experimental and complexation methods and revealed a dramatic impact of the preorganization and complementarity of the carbohydrate scaffold on the metal binding.

Federico Cisnetti, Jean-Didier Maréchal, Magali Nicaise, Régis Guillot, Michel Desmadril, François Lambert and Clotilde Policar
DOI: 10.1002/ejic.201200322

EurBest in EurJIC: Hybrid Cage Compounds with Organic and Inorganic Building Blocks

2012-06-26T00:10:00+02:00

Empty and filled hybrid cage compounds with siloxane as well as ether units between four phosphorus bridge-head atoms were obtained from the deprotonation of the cyclic siloxadiphosphane [O(SiiPr₂)₂PH]₂ and subsequent reaction with diiodo ethers. These compounds show very different coordination behaviour depending on the length of the ether chain and the metal cation used.

Andreas Kracke, Carsten von Hänisch and Nina Kramer
DOI: 10.1002/ejic.201200384

EurBest in EurJIC: Microwave-Assisted Synthesis of (N-Heterocyclic carbene)MCl Complexes of Group 11 Metals

2012-06-19T00:00:00+02:00

The use of microwave heating for the direct synthesis of (NHC)MCl complexes (NHC = N-heterocyclic carbene; M = Cu, Ag, Au) in very short reaction times is presented. Comparable or better yields than those reported by using conventional heating can be obtained with this protocol.

Brant Landers and Oscar Navarro
DOI: 10.1002/ejic.201200248

EurBest in EurJIC: Synthesis and Spectroscopic Characterisation of a Heterodinuclear Iron(III)-Copper(II) Complex Based on an Asymmetric Dinucleating Ligand System

2012-06-19T00:10:00+02:00

The synthesis of a new asymmetric dinucleating ligand FloH, designed with two sets of metal ion binding groups suited to selective complexation, is reported. The site-directed generation of a heterodinuclear Fe^IIICu^II complex is performed in highyield and purity by using FloH.

Florian Heims, Valeriu Mereacre, Antonella Ciancetta, Stefan Mebs, Annie K. Powell, Claudio Greco and Kallol Ray
DOI: 10.1002/ejic.201200156

EurBest in EurJIC: Isolated Silver Intermediate of Gold Precatalyst Activation

2012-06-12T00:00:00+02:00

The reaction of AgSbF₆ with the gold chloride complex of the extremely bulky N-heterocyclic carbene ligand IPr** (simplified in the figure) revealed a silver cation coordinated to a single AuCl fragment an intermediate proposed for most gold-catalyzed organic transformations.

Simone G. Weber, Frank Rominger and Bernd F. Straub
DOI: 10.1002/ejic.201200327

EurBest in EurJIC: Cobalt(II) Complexes Bearing a Bulky N-Heterocyclic Carbene for Catalysis of Kumada–Tamao–Corriu Cross-Coupling Reactions of Aryl Halides

2012-06-12T00:10:00+02:00

A series of cobalt(II) dimeric tetrahedral (30e) complexes were obtained in good yields and were transformed into the monomeric forms with pyridine. These complexes were characterized by SQUID, XPS, UV/Vis spectroscopy, elemental analysis, and X-ray crystallography, and were found to have high catalytic activity for KumadaTamaoCorriu cross-coupling reactions of aryl halides.

Kouki Matsubara, Tsukasa Sueyasu, Mariko Esaki, Aya Kumamoto, Shinya Nagao, Hitomi Yamamoto, Yuji Koga, Satoshi Kawata and Taisuke Matsumoto
DOI: 10.1002/ejic.201200095

EurBest in EurJIC: Single-Strand Molecular Wheels and Coordination Polymers in Copper(II) Benzoate Chemistry by the Employment of α-Benzoin Oxime and Azides: Synthesis, Structures, and Magnetic Characterization

2012-06-06T00:00:00+02:00

The reaction illustrated gives the decanuclear complexes [Cu₁₀(bzox)₁₀(DMF)₄] and [Cu₁₀(bzox)₁₀] (bzoxH₂ = α-benzoin oxime, DMF = N,N-dimethylformamide), which have a single-strand wheel topology, and the 1D chain [Cu(N₃)(O₂CPh)(MeOH)]_n. The Cu₁₀ clusters are both antiferromagnetically coupled with S = 0 ground states, whereas the 1D chain consists of ferromagnetically coupled S = 1/2 Cu^II ions.

Theocharis C. Stamatatos, Gina Vlahopoulou, Catherine P. Raptopoulou, Vassilis Psycharis, Albert Escuer, George Christou and Spyros P. Perlepes
DOI: 10.1002/ejic.201101292

EurBest in EurJIC: Porous Silica-Based Mixed Oxides with Basic Organic Sites

2012-06-05T00:00:00+02:00

Porous, organically modified silica-based mixed oxides were prepared by sol-gel processing of organotrialkoxysilanes with bridging amono groups and metal chlorides. Materials with ordered porosity and uniform mesopores were obtained with metal proportions up to about 20 %.

Jasmin Geserick, Sarah Meyer, Michael Puchberger, Silvia Pabisch, Herwig Peterlik, Ole Bethge, Emmerich Bertagnolli and Ulrich Schubert
DOI: 10.1002/ejic.201200088

EurBest in EurJIC: Copper Complexes of “Superpodal” Amine Ligands and Reactivity Studies towards Dioxygen

2012-06-05T00:10:00+02:00

Copper(I/II) complexes of varying nuclearity have been obtained with a series of tetrapodal pentadentate N-donor ligands.

Anna Jozwiuk, E. Alper Ünal, Stefan Leopold, John P. Boyd, Marco Haryono, Nadine Kurowski, Francisco Velazquez Escobar, Peter Hildebrandt, Jochen Lach, Frank W. Heinemann, Dennis Wiedemann, Elisabeth Irran and Andreas Grohmann
DOI: 10.1002/ejic.201101265

EurBest in EurJIC: FeIII Spin-Crossover Complexes with Photoisomerizable Ligands: Experimental and Theoretical Studies on the Ligand-Driven Light-Induced Spin Change Effect

2012-05-22T00:00:00+02:00

[Fe(salten)(3-azpy)]BPh₄ (1) and [Fe(salten)(4-azpy)]BPh₄ (2) have been synthesized and characterized [salten = 4-azaheptamethylene-1,7-bis(salicylideneiminate), azpy = phenylazopyridine]. Both exhibit a low to high spin transition in the solid state and are predominantly high spin in solution. cistrans isomerization of coordinated azpy leaves their spin equilibria almost unaffected.

Alexander Bannwarth, Sven Olaf Schmidt, Gerhard Peters, Frank D. Sönnichsen, Wulf Thimm, Rainer Herges and Felix Tuczek
DOI: 10.1002/ejic.201101227

EurBest in EurJIC: Rhodium Nanoparticles from Dirhodium(II) Ethylene Glycol Tetracarboxylates

2012-05-22T00:10:00+02:00

Rh^II carboxylates [Rh₂{O₂CCH₂(OCH₂CH₂)₂OCH₃}₄]_n and [Rh₂{O₂CCH₂(OCH₂CH₂)₂OCH₃}₄(PPh₃)] featuring ethylene glycol chains were prepared and used to generate rhodium nanoparticles using the alcohol-reducing process. Nanoparticle sizes between (3.0±0.4) and (3.9±0.4) nm were obtained.

André Tuchscherer, Rico Packheiser, Tobias Rüffer, Herbert Schletter, Michael Hietschold and Heinrich Lang
DOI: 10.1002/ejic.201101424

EurBest in EurJIC: Bio-Metallodendrimers – Emerging Strategies in Metal-Based Drug Design

2012-05-16T00:00:00+02:00

The use of metallodendrimers is fast becoming an attractive strategy in the design of a new class of metal-based biomolecules. This review surveys illustrative examples of these multivalent biologically active molecules as metal-based drugs and as agents for biosensing, photothermal and photodynamic therapy.

Preshendren Govender, Bruno Therrien and Gregory S. Smith
DOI: 10.1002/ejic.201200161

EurBest in EurJIC: Magnetoluminescent Agents for Dual MRI and Time-Gated Fluorescence Imaging

2012-05-15T00:00:00+02:00

The synthesis and characterization of Fe₃O₄@Tb-DOTAm-(acetylene)₃ and Fe₃O₄@Tb-DOTAm-(Phen)₃, two magnetoluminescent agents for dual imaging by MRI and confocal imaging are presented. The nanoparticles are characterized by high transverse and longitudinal relaxivities and long luminescence lifetimes ideal for time-gated spectroscopy.

Eric D. Smolensky, Yue Zhou and Valérie C. Pierre
DOI: 10.1002/ejic.201200045

EurBest in EurJIC: Synthesis, Reactivity and Ring-Opening Polymerization of a Tin-Bridged ansa-Cycloheptatrienyl-Cyclopentadienyl Titanium Sandwich Complex

2012-05-15T00:10:00+02:00

The synthesis of a tBu₂Sn-bridged ansa-cycloheptatrienyl-cyclopentadienyl titanium sandwich complex is presented. As a result of its tilted structure, this strained stanna[1]troticenophane is easily converted into poly(troticenylstannanes) by ring-opening polymerization and undergoes regioselective insertion of platinum(0) into the ipso-C₇H₆Sn bond upon reaction with [Pt(PEt₃)₃].

Alain C. Tagne Kuate, Constantin G. Daniliuc, Peter G. Jones and Matthias Tamm
DOI: 10.1002/ejic.201101339

EurBest in EurJIC: Spectroscopic Evidence in Solid and Solution of a Discrete Copper(I) Tetrahedral Complex Dimer Supported by Supramolecular Interactions

2012-05-08T00:00:00+02:00

The self-association in a tetrahedral [Cu(N-{4-nitrophenyl}pyridine-2-yl-methanimine)(PPh₃)Br] complex is reported. Experimental evidence for the dimerization in solution of this complex was obtained by NMR techniques. The dimer linked by noncovalent interactions has a close similarity to that in the crystalline packing. The thermodynamic parameters obtained by VT-¹H NMR suggest that this process is enthalpy driven.

Danilo H. Jara, Luis Lemus, Liliana Farías, Eleonora Freire, Ricardo Baggio and Juan Guerrero
DOI: 10.1002/ejic.201101356

EurBest in EurJIC: Design, Testing and Kinetic Analysis of Bulky Monodentate Phosphorus Ligands in the Mizoroki–Heck Reaction

2012-05-08T00:10:00+02:00

Bulky monodentate phosphoramidites give very fast palladium catalysts for the MizorokiHeck arylation with migratory insertion as rate-limiting step.

Deborah L. Dodds, Maarten D. K. Boele, Gino P. F. van Strijdonck, Johannes G. de Vries, Piet W. N. M. van Leeuwen and Paul C. J. Kamer
DOI: 10.1002/ejic.201101271

EurBest in EurJIC: Ruthenium Acetate Complexes as Versatile Probes of Metal–Ligand Interactions: Insight into the Ligand Effects of Vinylidene, Carbene, Carbonyl, Nitrosyl and Isocyanide

2012-04-30T00:00:00+02:00

The complex cis-[Ru(κ²-OAc)₂(PPh₃)₂] acts as a precursor for the formation of the complexes trans-[Ru(κ¹-OAc)(κ²-OAc)L(PPh₃)₂] where L is a two-electron donor, σ-donor/π-acceptor ligand. The structural and spectroscopic data of these species provide insight into the relative electron demand of the ligands L.

Christine E. Welby, Thomas O. Eschemann, Christopher A. Unsworth, Elizabeth J. Smith, Robert J. Thatcher, Adrian C. Whitwood and Jason M. Lynam
DOI: 10.1002/ejic.201100931

EurBest in EurJIC: Chelating C4-Bound Imidazolylidene Complexes through Oxidative Addition of Imidazolium Salts to Palladium(0)

2012-04-30T00:10:00+02:00

Oxidative addition of 4-iodoimidazolium salts to low-valent palladium(0) provides access to abnormal NHCpalladium complexes without requiring protection of the C2 position. Hence, this site is available for further functionalisation which allows, for example, dimetallic complexes to be prepared.

Anneke Krüger, Evelyne Kluser, Helge Müller-Bunz, Antonia Neels and Martin Albrecht
DOI: 10.1002/ejic.201100940