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Showing papers in "Organometallics in 2002"


Journal ArticleDOI
TL;DR: In this paper, the synthesis and X-ray crystallographic characterization of a Pd complex (3) with a rigid C,N,C-tridentate pincer carbene ligand are described.

334 citations


Journal ArticleDOI
TL;DR: Mononuclear palladium-allyl complexes bearing one N-heterocyclic carbene (NHC) ligand have been synthesized in this paper, which offer a straightforward entryway into a number of catalytic cycles by simple action of a base.

317 citations


Journal ArticleDOI
TL;DR: The Pd(OAc)2 or Pd2(dba)3/IMes·HCl (2, IMes = 1,3-bis(2,4,6-trimethylphenyl)imidazol-2-ylidene) system presents very high activity with respect to electron-neutral and electron-rich aryl chlorides.

302 citations


Journal ArticleDOI
TL;DR: The new air-stable and moisture-insensitive Ir catalysts for efficient transfer hydrogenation of ketones contain a chelating bis(N-heterocyclic carbene) ligand.

291 citations


Journal ArticleDOI
TL;DR: In this paper, a series of ruthenium carbene complexes with an electron-donating group on the carbene carbon were derived and determined to be Fischer-type carbenes.

256 citations


Journal ArticleDOI
TL;DR: In this paper, several [ONXO]-type zirconium and hafnium dibenzyl complexes of amine bisphenolate ligands, where X is a heteroatom donor located on a pendant arm, were synthesized directly from the ligand precursors and corresponding tetrabenzyl metal complexes in quantitative yields.

205 citations


Journal ArticleDOI
TL;DR: In this article, the authors showed that the selectivity for trimerization depends on the presence of a pendant arene group on the cyclopentadienyl ligand and the nature of the bridge between these two ligand moieties.

176 citations


Journal ArticleDOI
TL;DR: Theoretical ab initio calculations were carried out to simulate the hydrolysis of the siloxane bond under neutral and acidic conditions in this article, where the most important factors reducing the energy barrier of the reaction are the protonation of the nucleophile (acid catalysis) and the basic assistance provided by hydrogen bond complexes, which help to transfer a proton from a nucleophile to the leaving group.

176 citations


Journal ArticleDOI
TL;DR: In this paper, a band-target entropy minimization (BTEM) algorithm was proposed to recover the pure component spectra of the consti cation spectra from the experimental FTIR data of Rh4(CO)12/Rh6 (CO)16 mixtures.

167 citations


Journal ArticleDOI
TL;DR: In this article, an electron exchange model for spin coupling between Yb(III), with electron configuration 4f13, and the single unpaired electron in the bipyridyl radical anion was presented, based on comparison with the iodide salt [(Me5C5)2YbIII(bipy0)]+[I]-.

165 citations


Journal ArticleDOI
TL;DR: In this paper, a new class of water-soluble organometallic catalysts for pH-dependent transfer hydrogenation was developed, which showed a sharp maximum around pH 4.0 in the case of biphasic media.

Journal ArticleDOI
TL;DR: In this article, the crystal structure analysis confirmed the monomeric nature of complex 2, the coordination around the metal being quasi-linear with a C(1−Ag−Br bond angle of 169.4(1)° and a Ag−C( 1) bond length of 2.093(4) A.

Journal ArticleDOI
TL;DR: Nickel(II) heterocyclic carbene complexes of the formula NiI2(carbene)2 have been prepared and fully characterized by both spectroscopic methods and single-crystal X-ray structure analysis as discussed by the authors.

Journal ArticleDOI
Siu-Wai Lai1, Hiu-Wah Lam1, Wei Lu1, Kung-Kai Cheung1, Chi-Ming Che1 
TL;DR: In this paper, a metal−metal-to-ligand charge transfer (MMLCT) was proposed for the absorption of a dimeric species via 2[Pt(C∧N ∧N)(C⋮NnBu)]+

Journal ArticleDOI
TL;DR: In this article, the results of X-ray structure analyses of W(CO)5PH3 and Mo( CO)5PCl3 are reported, showing that PCl3 is a poorer σ donor and a stronger π(P) acceptor than the other phosphanes.

Journal ArticleDOI
TL;DR: Me2Si(OHF)(CpR*)LnCl2-Li(DME)2+ catalyst precursors can be prepared in up to ∼90% diastereomeric purity and then converted into the corresponding amido catalysts, which can be isolated in ∼100% of the purity after recrystallization as mentioned in this paper.

Journal ArticleDOI
TL;DR: The titanatranes (Ar = 2,6-di-i-Pr-phenoxy; Ar‘ = 2.4-meC6H2; Ar = 0, 5; x = 1, 6; x= 2, 7; x: 3, 8) as mentioned in this paper were synthesized from the corresponding trihydroxy chelating ligands 1−4, respectively, using an equimolar mixture of Ti(O-I-Pr)4 and 2

Journal ArticleDOI
TL;DR: Recent developments in the chemistry of cyclopentadienyl derivatives of the alkaline-earth (group 2) metals are reviewed in this paper, where new complexes and their applications in organometallic and materials synthesis reflect the growing number of ways that can be used to manipulate the alkalinear-earth−cyclopentadiyl bond.

Journal ArticleDOI
TL;DR: In this paper, the band-target entropy minimization (BTEM) algorithm was applied to semi-batch homogeneous catalytic reactions without spectral preconditioning, and the pure component spectra of background moisture and carbon dioxide, hexane, dissolved CO in hexane and the dissolved species present, namely the organic reactant 3,3-dimethylbut-1-ene, the organic product 4,4-dimmethylpentanal, the c...

Journal ArticleDOI
TL;DR: A set of TpTiCl3 and Tp‘TiCl2(OR) complexes containing tris(pyrazolyl)borate ligands with diverse steric properties has been evaluated for ethylene polymerization under MAO activation conditions as mentioned in this paper.

Journal ArticleDOI
TL;DR: In this article, the tris(alkyl) precursors [M(CH2SiMe2R)3(THF)2] (M = Sc, 1-ScR; M = Y, 1YR; R = CH3, Ph) via alkane elimination.

Journal ArticleDOI
TL;DR: In this paper, the reaction of AuCl(tht) (tht = tetrahydrothiophene) with various ylides in equimolar amounts give the complexes [AuCl(ylide)]Xn (n = 0, ylide = C(PPh3)2 (1a), 4-MeC6H4SO2CHPPh 3 (1b); n = 1, X = TfO, YLide = [HCP3]2]+ (2)) and [(AuCL)2{

Journal ArticleDOI
TL;DR: The ruthenium chelate complexes as mentioned in this paper were prepared by reaction of the Grubbs catalyst 1 and its second-generation analogue 2 with the 2-vinylbenzoic acid isopropyl ester 3 in the presence of CuCl.

Journal ArticleDOI
TL;DR: The tridentate ligand 4-carboxy-6-phenyl-2,2-bipyridine (HL1) was used to prepare the cyclometalated Pd(II) complex [Pd(L1)Cl].

Journal ArticleDOI
TL;DR: In this paper, the reactivity of the complexes [Pd(C6H4X-2)Br(bpy)] (bpy = 2,2‘-bipyridine; X = C(O)Me (1a), CN (1b), CHO (1c)), and trans-[Pd{C 6H4CHCH2-2}(PPh3)(bpy), TfO) (TfO = CF3SO3);

Journal ArticleDOI
TL;DR: In this article, two dimeric benzylcalcium complexes were prepared and structurally characterized by single-crystal X-ray diffraction: (Me3Si-fluorenyl) and (EtMe4Cp) complexes.

Journal ArticleDOI
TL;DR: In this article, a β-diketiminato chromium complex was prepared to serve as a homogeneous model system for the heterogeneous Phillips ethylene polymerization catalyst, which was found to polymerize ethylene in the presence of excess methylaluminoxane (MAO).

Journal ArticleDOI
TL;DR: In this article, the dehalogenation of aryl halides was efficiently performed in refluxing THF using a catalytic combination composed of Ni(0)/N-heterocyclic carbene (NHC)/β-hydrogen-containing alkoxide.

Journal ArticleDOI
TL;DR: In this article, quantum chemical DFT calculations using B3LYP and BP86 functionals have been carried out for the title compounds and the equilibrium geometries and bond dissociation energies are reported.

Journal ArticleDOI
TL;DR: In this article, a new practical protocol that avoids the stoichiometric use of either thallium or silver salts for the synthesis of the title compound is described, which avoids the need to use either of them.