η2-Alkyne copper(I) and silver(I) compounds; from polymeric [MIR]η to monomeric [MIR] units (MCu, Ag)

Lang, Heinrich; Köhler, Katrin; Blau, Sabine

doi:10.1016/0010-8545(94)07001-z

Cited by 207 publications

(99 citation statements)

References 164 publications

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“…The absence of cis-PtA C H T U N G T R E N N U N G (dppe)-bis-b-lactam 21 as a by-product was confirmed by the 31 P NMR spectrum of the crude reaction product. The reaction product was isolated by chromatography on silica gel (68 % yield) and identified as an inseparable 1:1 mixture of the diastereomeric syn/anti-bimetallic tetra-b-lactams 23 a, b by NMR spectroscopy and FABMS (Scheme 7).…”

Section: Resultsmentioning

confidence: 66%

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The Assembly of Macrocyclic Bis‐ and Tetra‐β‐lactams with Embedded Platinum or Palladium Square‐Planar Centers

Pellico

Gallego

Ramírez‐López

et al. 2009

Chemistry A European J

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The synthesis, isolation, and full characterization of different types of stable, metal-assembled macrocyclic beta-lactams are reported. By using adequately functionalized bis-beta-lactams with defined stereochemistry as building blocks, a series of mono- and bimetallic Pd and Pt macrocycles has been prepared in good to quantitative yields. These novel structures combine the beta-lactam moiety with transition-metal fragments with cis-square-planar geometry and constitute a new class of metal-assembled cavities involving molecules with biological relevance as building blocks. By combining the adequate ligands, metallic fragments, and tuning the reaction conditions, different mono- and bimetallic macrocyclic beta-lactam cavities can be selectively obtained. Macrocycles with Pt-ethynyl groups are suitable to form host-silver triflate guest complexes in a tweezer fashion.

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Section: Resultsmentioning

confidence: 66%

“…However, when the reaction was carried out in the presence of a weak base such as sodium acetate, [28] a single product 21 was obtained. The 31 P NMR spectrum of the crude reaction product showed a sharp signal at d = 42.6 ppm (J P,Pt = 2367 Hz), which is consisScheme 2. Examples of bio-organometallic metallomacrocycles.…”

Section: Resultsmentioning

confidence: 97%

The Assembly of Macrocyclic Bis‐ and Tetra‐β‐lactams with Embedded Platinum or Palladium Square‐Planar Centers

Pellico

Gallego

Ramírez‐López

et al. 2009

Chemistry A European J

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“…Finally, a crystal structure of the first ( 2 -alkene)-Au(I)-phosphine complex 4 was obtained using an analogous alkenetethered phosphine ligand (15)(16)(17)(18)(19) (Fig. 5).…”

Section: Resultsmentioning

confidence: 99%

Synthesis and structural characterization of isolable phosphine coinage metal π-complexes

Shapiro

Toste

2008

Proc. Natl. Acad. Sci. U.S.A.

151

107

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The chemical community has recently witnessed a dramatic increase in the application of cationic gold(I)-phosphine complexes as homogeneous catalysts for organic synthesis. The majority of gold(I)-catalyzed reactions rely on nucleophilic additions to carbon-carbon multiple bonds, which have been activated by coordination to a cationic gold(I) catalyst. However, structural evidence for coordination of cationic gold(I) complexes to alkynes has been limited. Here, we report the crystal structure of a gold(I)-phosphine 2 -coordinated alkyne. Related Ag(I) and Cu(I) complexes have been synthesized for comparison. The crystallization of these complexes was enabled by tethering a labile alkyne ligand to a strongly coordinating triarylphosphine. This approach also proved applicable to crystallization of the first gold(I)-phosphine 2 -coordinated alkene.alkyne complexes ͉ DFT calculations ͉ gold catalysts ͉ homogenous catalysis ͉ x-ray structures

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“…This versatile and structurally interesting field was comprehensively reviewed by Lang et al [7] In the following we report on the capability of the pentacarbonylrhenium alkynes (OC) 5 ReCCR (R Re-(CO) 5 (1), SiMe 3 (2)) [8] to act as h 2 -ligands in Group 11 metal complexes. We were especially interested in the coordination mode of the dirhenioacetylide (OC) 5 ReCCRe(CO) 5 .…”

Section: Introductionmentioning

confidence: 99%

“…[24] NMR titrations of solutions containing alkynes with AgO 3 SCF 3 showed a maximum Ag /alkyne ratio of 1:1, and so far only silver alkyne complexes with stoichiometries 1:2 or 1:1 have been characterized. [7,25] When we treated 1 with 0.5 equivalents of [Ag(NCMe) 4 ]BF 4 or with 2.0 equivalents of AgO 3 SCF 3 in dichloromethane, two products 6 and 8 were isolated. According to their elemental analyses both these compounds exhibited 2:1 stoichiometries, similar to that for the copper complex 4.…”

mentioning

confidence: 99%

Coordination Chemistry of Pentacarbonylrheniumacetylide Complexes with Copper, Silver, and Gold(I): (OC)5ReC≡CRe(CO)5 as Ligand

Mihan¹,

Sünkel²,

Beck³

1999

Chem. Eur. J.

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η2-Alkyne copper(I) and silver(I) compounds; from polymeric [MIR]η to monomeric [MIR] units (MCu, Ag)

Cited by 207 publications

References 164 publications

The Assembly of Macrocyclic Bis‐ and Tetra‐β‐lactams with Embedded Platinum or Palladium Square‐Planar Centers

The Assembly of Macrocyclic Bis‐ and Tetra‐β‐lactams with Embedded Platinum or Palladium Square‐Planar Centers

Synthesis and structural characterization of isolable phosphine coinage metal π-complexes

Coordination Chemistry of Pentacarbonylrheniumacetylide Complexes with Copper, Silver, and Gold(I): (OC)5ReC≡CRe(CO)5 as Ligand

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