making the transfer thermodynamically unfavorable.
Read more about this ligand duality for FREE until 13th December 2012:
The influence of reversible trianionic pincer OCO3– µ-oxo CrIV dimer formation ([CrIV]2(µ-O)) and donor ligands in oxygen-atom-transfer (OAT)
Matthew E. O’Reilly, Trevor J. Del Castillo, Khalil A. Abboud and Adam S. Veige
Dalton Trans., 2012, Advance Article
DOI: 10.1039/C1DT11104C
Silanetriols are compounds of the general formula Si(OH)3R which readily form polysiloxanes by condensation, by substituting R for condensation resistant ligands a range of crystal structures have been identified for different solid state silanetriol compounds. Norbert W. Mitzel and colleagues have been investigating the intermolecular forces of gaseous silanetriols, the first investigation of its kind, with the aim of discovering if tert-butylsilanetriol [tBuSi(OH)3] dimerises via H-bonds or remains monomeric when in the gas state.
Intrigued? To find out more about the teams findings, including the taste of their silanetriol, read the full HOT article which is free to access until the 20th of December
Silanetriols in the gas phase: single molecules vs. hydrogen-bonded dimers
Stefan Spirk, Raphael J. F. Berger, Christian G. Reuter, Rudolf Pietschnig and Norbert W. Mitzel
Dalton Trans., 2012, Advance Article
DOI: 10.1039/C1DT11740H, Communication
The Suzuki–Miyaura cross-coupling of aryl halides with organoboronic acids is an important tool for synthetic organic chemistry. A range of palladium complexes with different ligands can been used to catalyse this interesting reaction and Ajai Kumar Singh and co-workers have synthesised four new ligands (selenated Schiff bases) to investigate the influence alkyl chain lengths have on the [Pd(L–H)Cl] complexes and their catalytic efficiency. Their remarkable results indicate there is a correlation between ligand alkyl chain length and catalytic efficiency, however, as their Dalton Transactions HOT Article details, the Pd(II) complexes are pre-catalysts which generate in situ real catalytic species of approx. 3 nm Pd(0) nanoparticles, protected by organoselenium species……….
To find out more about this fascinating discovery read the full article which is free to access until the 20th Decemeber.
Palladium(II)-selenated Schiff base complex catalyzed Suzuki–Miyaura coupling: Dependence of efficiency on alkyl chain length of ligand
Gyandshwar Kumar Rao, Arun Kumar, Bharat Kumar, Dinesh Kumar and Ajai Kumar Singh
Dalton Trans., 2012, Advance Article
DOI: 10.1039/C1DT11695A
Rational design of MOFs is a complex task with a range of variables including ligands, metals, reaction conditions and solvents, this HOT Communication in Dalton Trans. details the synthesis of a novel metal organic framework (MOF) using an aromatic linker and CdBr2. Leonard Barbour and Marike du Plessis synthesised the framework with different solvents and discovered different packing modes for the different solvent systems…… to find out more about their discoveries read the full Communication in Dalton Transactions.
Supramolecular isomerism and solvatomorphism in a novel coordination compound
Marike du Plessis and Leonard J. Barbour
Dalton Trans., 2012, Advance Article
DOI: 10.1039/C1DT11564B, Communication
Can we mimic the Photosystem II machinery for light-driven oxidation of water to molecular oxygen?
In this Dalton Transactions Perspective, Philipp Kurz and colleagues discuss manganese-containing compounds that have been studied as potential analogues of the oxygen-evolving-complex in Photosystem II. They highlight how the desire to produce solar fuels is inspiring research into artificial photosynthesis.
Read more for free until 29th November at:
Water oxidation catalysed by manganese compounds: from complexes to ‘biomimetic rocks’
Mathias Wiechen, Hans-Martin Berends and Philipp Kurz
Dalton Trans., 2012, Advance Article
DOI: 10.1039/C1DT11537E, Perspective
You might also find these Dalton Trans. articles on biomimetic water-oxidation catalysis interesting…
Nano-size amorphous calcium–manganese oxide as an efficient and biomimetic water oxidizing catalyst for artificial photosynthesis: back to manganese
Mohammad Mahdi Najafpour, Sara Nayeri and Babak Pashaei
Dalton Trans., 2011, 40, 9374-9378
DOI: 10.1039/C1DT11048A
High turnover catalysis of water oxidation by Mn(II) complexes of monoanionic pentadentate ligands
Rune Kirk Seidler-Egdal, Anne Nielsen, Andrew D. Bond, Morten J. Bjerrum and Christine J. McKenzie
Dalton Trans., 2011, 40, 3849-3858
DOI: 10.1039/C0DT01340D
The role of functional bidentate ligands in catalysis provides a versatile tool for fine tuning the performance of catalysts (Lewis base – Lewis acid interactions).
Read more for FREE until 29th November at:
A phosphino-oxazoline ligand as a P,N-bridge in palladium/cobalt or P,N-chelate in nickel complexes: catalytic ethylene oligomerization
Shuanming Zhang, Roberto Pattacini, Suyun Jie and Pierre Braunstein
Dalton Trans., 2011, Advance Article
DOI: 10.1039/C1DT11352F
Luminescent iridium complex surfactants form spherical aggregates in water, changing from red to green on aggregation, scientists from Germany and Italy have discovered.
The team, led by Luisa De Cola, say that the aggregates have different properties to the single components, and that the change between them could enable this system to be used as a probe for bio-imaging and bio-labelling. Read more in their Hot Article – free to access until the 29th November 2011.
Aggregation induced colour change for phosphorescent iridium(III) complex-based anionic surfactants
Matteo Mauro, Gabriele De Paoli, Matthias Otter, Daniela Donghi, Giuseppe D’Alfonso and Luisa De Cola
Dalton Trans., 2011, DOI: 10.1039/C1DT11251A
1,1′-((4,6-dimethyl-1,3-phenylene)bis(methylene))bis(3-methyl-1H-imidazol-3-ium) in
the presence of Cs2CO3 and [Ir(µ-Cl)(cod)]2. Its solid-state structure, determined by X-ray
diffraction, shows a figure-of-eight loop with both the P and M enantiomers being present. Solution NMR studies were also performed to examine the enantiodiscrimination between them.
Read more for FREE until the 29th November 2011 at:
Chiral anion-based NMR enantiodiscrimination of a dinuclear, cationic Ir(I) NHC complex with a figure-of-eight loop structure
Xianghao Liu, Jérôme Lacour and Pierre Braunstein
Dalton Trans., 2012, Advance Article
DOI: 10.1039/C1DT11604E
Also read about the formation of unprecedented eight-membered chelates at:
Contrasting bonding modes of a tridentate bis(oxazoline)phosphine ligand in cobalt and iron vs. palladium complexes: unprecedented N,N-coordination for a N,P,N ligand
Anthony Kermagoret and Pierre Braunstein
Dalton Trans., 2008, 585-587
DOI: 10.1039/B717021C
Read more for FREE until mid-November:
Sulfonate-tagged 1,4-diazabutadiene (DADS) ligands and their noble-metal complexes – synthesis, characterization and immobilization in ionic liquids
Benjamin Oelkers and Jörg Sundermeyer
Dalton Trans., 2011, Advance Article
DOI: 10.1039/C1DT10939A
Read more about these gold complexes for FREE until mid-November at:
P–H activation using alkynylgold substrates: steric and electronic effects
Gerald F. Manbeck, Mark C. Kohler, Meghan R. Porter and Robert A. Stockland Jr.
Dalton Trans., 2011, Advance Article
DOI: 10.1039/C1DT11337B
