Dalton Transactions

doi: 10.1039/c005390mpmid: N/A

doi: 10.1039/c005391kpmid: N/A

Redshaw, Carl

doi: 10.1039/b924088hpmid: 20358134

High-valent vanadium complexes bearing a variety of chelating aryloxides including di- and linear tri-phenolates, C/N-capped tripods, phenoxyimines and calixarenes type ligands, when used in combination with dialkylaluminium halides as co-catalyst and a reactivator, are found to act as highly active catalytic systems for α-olefin polymerisation. Pro-catalyst structure–catalytic activity trends can be identified for the various ligand families employed.

Talbi, Barisa; Haquette, Pierre; Martel, Annie; de Montigny, Frédéric; Fosse, Céline; Cordier, Stéphane; Roisnel, Thierry; Jaouen, Gérard; Salmain, Michèle

doi: 10.1039/c001630fpmid: 20407675

Covalent embedding of a (η6-arene) ruthenium(ii) complex into the protein papain gives rise to a metalloenzyme displaying a catalytic efficiency for a Lewis acid-mediated catalysed Diels–Alder reaction enhanced by two orders of magnitude in water.

Gu, Ja-Min; Kwon, Tae-Hwan; Park, Ji-Hyun; Huh, Seong

doi: 10.1039/c0dt00392apmid: 20498861

A Zn-MOF assembled from a new C2h-symmetric terphenyl dicarboxylate and DABCO was prepared and characterized by X-ray crystallography and gas sorption analysis: a preferential sorption of CO2 over N2 and H2 was observed with an exceptionally high CO2 adsorption enthalpy.

Guo, Xiaofang; Zhu, Kaiyue; Li, Zifeng; Li, Gang; Lu, Huijie; Zang, Shuangquan; Hou, Hongwei

doi: 10.1039/c001831gpmid: 20498860

A new 2-D cluster-based polymer {[CuI6CuII6L6(H2O)3(CH3OH)6]·5H2O·3CH3OH}n (2) (H3L = C6H5C(O)NHC(S)NHCH2COOH) containing unique mixed-valence [CuI6CuII6L6] subunits was synthesized by reaction of single crystals of [Ln2(H2L)4(Phen)2(NO3)2] (Ln = Pr (1a), Nd (1b) or Ho (1c)) (Phen = 1,10-phenanthroline) with copper(ii) acetate in aqueous DMF. Interestingly, cation-exchanged products {[CuI6CuII5Zn(H2O)3(CH3OH)6]·5H2O·3CH3OH}n (3) or {[CuI6CuII4Co2(H2O)3(CH3OH)6]·5H2O·3CH3OH}n (4) were obtained from single crystals of 2 and the appropriate M(NO3)2 (M = Zn or Co) in H2O.

Roach, Benjamin D.; Forgan, Ross S.; Tasker, Peter A.; Swart, Ronald M.; Campbell, John; McAllister, Fiona E.; Stopford, Andrew P.; Duncombe, Bridgette J.

doi: 10.1039/c003135fpmid: 20485809

Ligand–ligand interactions in the outer coordination sphere make an important contribution to the effects of 3-substituents on the stabilities of anionic Cu(ii) salicylaldoximato complexes [CuL(L-H)]−. When substituents contain a different number of bonds the interpretation of CID tandem mass spectrometry must take into account the ability of ions to redistribute energy acquired in collisions within different numbers of vibrational modes.

Patra, Malay; Gasser, Gilles; Bobukhov, Dmytro; Merz, Klaus; Shtemenko, Alexander V.; Metzler-Nolte, Nils

doi: 10.1039/c003598jpmid: 20485811

In the view of developing a synthetic route for the controlled insertion of distinct organometallic moieties into peptide nucleic acid (PNA) oligomers, a proof-of-principle study of the chemoselective insertion of three different organometallics into a building block containing both a PNA backbone and an alkyne side-chain is presented in this study.

Deacon, Glen B.; Junk, Peter C.; Moxey, Graeme J.

doi: 10.1039/c0dt00122hpmid: 20485729

Treatment of Ca or Sr metal with Hg(C6F5)2 and 2,4,6-trimethylphenol (HOmes) in 1,2-dimethoxyethane (dme) at room temperature resulted in C–F bond activation, giving rise to the unique fluoro(aryloxo)alkaline earth cages [Ca5(μ4-F)(μ3-F)4(μ-Omes)4(Omes)(dme)4] 1 and [Sr10(μ4-F)4(μ3-F)4(μ-Omes)12(dme)4] 2, which can be viewed as arrested fluorite structures.

Döring, Alexander; Schulzke, Carola

doi: 10.1039/c000489hpmid: 20495719

The redox potentials of strictly analogous complexes of molybdenum and tungsten were studied using temperature dependent electrochemistry in order to evaluate a proposed influence of the potentials on the use of tungsten at thermophilic conditions and the use of molybdenum at mesophilic conditions in the molybdopterin dependent oxido reductases. Each pair of molybdenum and tungsten compounds was studied under identical conditions. The studies reveal that tungsten's redox potential is always more temperature sensitive than molybdenum's with a stronger shift of the potential upon temperature change in negative or positive direction depending on the ligand system. No exceptions to this different behaviour of molybdenum and tungsten were observed. The conducted experiments are described in detail and the relevance for the use of either metal is discussed. In addition a possible reason for this fundamental difference as part of the nature of molybdenum and tungsten is proposed.