Bridged <i>fac</i>‐Tricarbonylrhenium(I)–Biscarbene Complexes: Synthesis, Characterization, and Molecular Dynamics

Hiltner, Oliver; Boch, Florian J.; Brewitz, Lennart; Härter, Peter; Drees, Markus; Herdtweck, Eberhardt; Herrmann, Wolfgang A.; Kühn, Fritz E.

doi:10.1002/ejic.201000690

Cited by 29 publications

(20 citation statements)

References 38 publications

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“…Solvent and reagents were purchased from Sigma Aldrich and used as received without any purification. Nuclear magnetic resonance spectra were recorded using a Bruker AVN400 (400.13 MHz for 1 H, 100.6 MHz for 13 C) spectrometers at ambient temperature. 1 H and 13 C chemical shifts were referenced to residual solvent resonances.…”

Section: General Synthetic Detailsmentioning

confidence: 99%

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N-Heterocyclic carbenes as π*-acceptors in luminescent Re(i) triscarbonyl complexes

et al. 2011

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Two rhenium(I) carbonyl complexes of the type fac-[Re(CO)(3)(N^C)X] where N^C is an N-heterocyclic carbene [3-butyl-1-(2'-pyridyl)benzimidazolin-2-ylidene] and X is either Cl or Br have been synthesised via an in situ method from [Re(CO)(5)X] and a respective benzimidazolium salt. The complexes have been characterised by (1)H and (13)C NMR, infra-red spectroscopy and in the case of the bromo-complex by a single-crystal X-ray diffraction study. The photophysical properties of the complexes have been investigated, revealing similar phosphorescent emission which was attributed to radiative decay from a (3)MLCT state partially mixed with a (3)LLCT state. However, the analysis of excited state lifetime and quantum yield values revealed distinct photophysical behaviour for the two complexes, which was attributed to the more labile nature of the bromo ligand with respect to the chloro one. The explanation was supported by the time-dependent emission profile change in diluted acetonitrile solutions.

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Section: General Synthetic Detailsmentioning

confidence: 99%

“…Nuclear magnetic resonance spectra were recorded using a Bruker AVN400 (400.13 MHz for 1 H, 100.6 MHz for 13 C) spectrometers at ambient temperature. 1 H and 13 C chemical shifts were referenced to residual solvent resonances. IR spectra were obtained using a diamond ATR Perkin Elmer Spectrum 100 FT-IR.…”

Section: General Synthetic Detailsmentioning

confidence: 99%

N-Heterocyclic carbenes as π*-acceptors in luminescent Re(i) triscarbonyl complexes

et al. 2011

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“…Building on previous work, Herrmann and coworkers recently reported a more convenient way to fac-tricarbonylrhenium(I) complexes. [41][42][43] The group used [NEt 4 ] 2 [ReBr 3 (CO) 3 ] (P14) as the metal precursor, a compound that is very easy to obtain from a reaction of Re(CO) 5 Br (P13) and (NEt 4 )Br in diglyme at 110 1C. It was shown that P14 reacts at room temperature in THF with monocarbenes such as L4 (IMe) and L5 (I i Pr) to form unbridged Re(I) bis(NHC) complexes bearing a fac-Re(CO) 3 core.…”

Section: Rhenium(i) Nhc Complexesmentioning

confidence: 99%

“…In situ generation of the free carbene with sodium hexamethyldisilylamide, as done by Huertos et al 38 and subsequent reaction with P14 yielded a plethora of air and water stable compounds C59x. [41][42][43] Concerning ligand variation, Re(I) compounds are extensively studied. Very little research, however, has been done on the application of such Re(I) NHC compounds.…”

Section: Rhenium(i) Nhc Complexesmentioning

confidence: 99%

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Group 7 transition metal complexes with N-heterocyclic carbenes

et al. 2013

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This tutorial review summarizes all works and highlights recent advances published in the growing field of group 7 N-heterocyclic carbene (NHC) complexes. It provides a valuable source for all scientists that are interested in conducting research with new compounds bearing these metals. The article provides an overview of all manganese NHC complexes that are known to date. There are a lot of examples where manganese NHC complexes show unpredicted behaviour during synthesis, very different from other transition metal NHC complexes and their higher homologues rhenium and technetium. These differences are depicted and discussed. Furthermore, the chemistry of technetium NHC compounds and their chemical behaviour are discussed. To date published work on technetium NHC chemistry has been restricted to the oxidation state +v. It was found that such compounds are very reactive but show great stability in dry air. Their radioactivity makes such compounds interesting candidates for radiochemical applications. Since most group 7 NHC chemistry was conducted on rhenium NHC complexes, this tutorial review highlights the chemical behaviour of such compounds. Rhenium(i) complexes reveal luminescent properties, making them interesting candidates for applications ranging from biological markers to organic light-emitting diodes (OLEDs). Another interesting feature is the radioactivity of some compounds, which makes them excellent candidates for radiopharmaceutical research; hence their synthesis and reactivity are discussed.

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Coordination Chemistry, Reactivity, and Applications of Early Transition Metal Complexes Bearing N ‐Heterocyclic Carbene Ligands

Bellemin‐Laponnaz

Dagorne

2014

N‐Heterocyclic Carbenes

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Bridged fac‐Tricarbonylrhenium(I)–Biscarbene Complexes: Synthesis, Characterization, and Molecular Dynamics

Abstract: Six new biscarbene complexes of the type fac-[(CO), where L represents a chelating bis(N-heterocyclic carbene) ligand consisting of two alkylene-bridged (RЈ), Nsubstituted (R) imidazoline moieties (1,1Ј-diR-3,3Ј-RЈ-diimidazoline-2,2Ј-diylidene), were synthesized. Spectroscopic

Cited by 29 publications

References 38 publications

N-Heterocyclic carbenes as π*-acceptors in luminescent Re(i) triscarbonyl complexes

N-Heterocyclic carbenes as π*-acceptors in luminescent Re(i) triscarbonyl complexes

Group 7 transition metal complexes with N-heterocyclic carbenes

Coordination Chemistry, Reactivity, and Applications of Early Transition Metal Complexes Bearing N ‐Heterocyclic Carbene Ligands

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