Preparations of cobalt-containing phosphines and reactions toward dicobalt octacarbonyl

Hong, Fung‐E; Lai, Yi‐Chun; Ho, Yi-Jung; Chang, Yu‐Chang

doi:10.1016/j.jorganchem.2003.09.003

Cited by 20 publications

(2 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The crystal structure of 4c-PdCl 2 reveals a unique bonding mode between Pd and 4c . It leads to the ratio of Pd/ligand = 1:1 16b. Note that in 4c-PdCl 2 a direct Co−Pd covalent bond ( r = 2.6171(5) Å) was formed that is joined with a P→Pd dative bond.…”

Section: Resultsmentioning

confidence: 98%

Design, Synthesis, Application, and DFT Investigation of Suzuki−Miyaura Reactions of a Dicobalt Carbonyl-Containing Phosphine Ligand

2005

View full text Add to dashboard Cite

The preparation and characterization of a novel dicobalt-containing monophosphine ligand, 4a, is presented. Palladium-catalyzed Suzuki-Miyuara reactions employing 4a/Pd(OAc) 2 were pursued. The optimized reaction conditions were found to start with 1 molar equiv of arylhalides, 1.5-fold of phenylbronic acid, 3-fold of KF in 1 mL of THF, and 1 mol % of 4a/ Pd(OAc) 2 as catalytic precursor. The 31 P NMR studies reveal moderate reductive capacity of 4a toward Pd(OAc) 2 . The unique bonding mode of 4a toward Pd ensures that the ratio of 4a/Pd is equal to 1:1. Two plausible active species, I and [I-OAc] -, were proposed as the catalytically active species in the Suzuki-Miyaura cross-coupling reaction. The validity of this assumption was examined by 31 P NMR spectra and density functional theory (DFT) means. In addition, we have demonstrated theoretically that the dicobalt moiety of 4a acts as an effective auxiliary in stabilizing the Pd(0) center during catalytic reaction.

show abstract

Section: Resultsmentioning

confidence: 98%

Design, Synthesis, Application, and DFT Investigation of Suzuki−Miyaura Reactions of a Dicobalt Carbonyl-Containing Phosphine Ligand

2005

View full text Add to dashboard Cite

show abstract

“…It is known that monodentate phosphine ligands prefer the pseudoaxial sites of alkyne dicobalt carbonyl complexes; X-ray structures of both monosubstituted [4,[59][60][61][62][63][64] and disubstituted [65][66][67] phosphine complexes confirm this. All previous X-ray structures of diphosphine-bridged alkyne dicobalt complexes have, however, exhibited pseudoequatorial substitution [5,56,[68][69][70][71][72][73][74][75][76][77][78][79].…”

Section: Crystal Structure Of (2)mentioning

confidence: 93%

A comparison between the reaction of P2Ph4 with [{Co2(CO)6}2(μ-η2:μ-η2-HOCH2CCCCCH2OH)] and the reaction of [Co2(μ-PPh2)2(CO)6] with HOCH2CCCCCH2OH

Caffyn

Mays

2005

Journal of Organometallic Chemistry

View full text Add to dashboard Cite

Multinuclear Silver Ethynide Supramolecular Synthons for the Construction of Coordination Networks

Mak¹,

Zhao²

2007

Chemistry An Asian Journal

128

View full text Add to dashboard Cite

The invariant appearance of the mu8 coordination mode for the C4(2-) dianion in its silver(I) complexes, with four silver(I) atoms attached to each terminal ethynide moiety, implies that the Ag4[cap]C[triple bond]C-C[triple bond]C[cap]Ag4 species may be considered as a new type of supramolecular synthon for the construction of 1D, 2D, and 3D coordination polymers. This Focus Review covers recent results on the synthesis and structural characterization of silver(I) arylethynide and alkylethynide complexes, which established the existence and utility of analogous polynuclear supramolecular synthons R-C[triple bond]C[cap]Ag(n) (R = aryl or alkyl; n = 4, 5) and Ag(n)[cap]C2-R-C2[cap]Ag(n) (R = p-, m-, o-C6H4; n = 4, 5). The interplay of silver-ethynide bonding, which can be classified into sigma, pi, and mixed (sigma,pi) types, with argentophilicity, pi-pi stacking, and other weak interactions highlights the complexity and challenge in building coordination networks of silver ethynide complexes.

show abstract

Preparations of cobalt-containing phosphines and reactions toward dicobalt octacarbonyl

Cited by 20 publications

References 25 publications

Design, Synthesis, Application, and DFT Investigation of Suzuki−Miyaura Reactions of a Dicobalt Carbonyl-Containing Phosphine Ligand

Design, Synthesis, Application, and DFT Investigation of Suzuki−Miyaura Reactions of a Dicobalt Carbonyl-Containing Phosphine Ligand

A comparison between the reaction of P2Ph4 with [{Co2(CO)6}2(μ-η2:μ-η2-HOCH2CCCCCH2OH)] and the reaction of [Co2(μ-PPh2)2(CO)6] with HOCH2CCCCCH2OH

Multinuclear Silver Ethynide Supramolecular Synthons for the Construction of Coordination Networks

Contact Info

Product

Resources

About