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Volumn 689, Issue 20, 2004, Pages 3203-3209

Irreversible cleavage of a carbene-rhodium bond in Rh-N-heterocyclic carbene complexes: Implications for catalysis

Author keywords

Catalysis; Hydrogenation; N heterocyclic carbene; Rhodium complex

Indexed keywords

CATALYSIS; CHEMICAL BONDS; HYDROGENATION; REACTION KINETICS; SOLVENTS;

EID: 10344232464     PISSN: 0022328X     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.jorganchem.2004.07.021     Document Type: Article
Times cited : (63)

References (48)
  • 28
    • 10344227341 scopus 로고    scopus 로고
    • P-Rh = 119.8 Hz) indicating that the two phosphines are cis to each other [12]. X-ray crystallographic analysis confirms the cis orientation in the solid state [13]
    • P-Rh = 119.8 Hz) indicating that the two phosphines are cis to each other [12]. X-ray crystallographic analysis confirms the cis orientation in the solid state [13]
  • 29
    • 0031589115 scopus 로고    scopus 로고
    • With less bulky carbenes, a trans arrangement of phosphines is observed
    • With less bulky carbenes, a trans arrangement of phosphines is observed: B. Cetinkaya I. Ozdemir P.H. Dixneuf J. Organomet. Chem. 534 1997 153
    • (1997) J. Organomet. Chem. , vol.534 , pp. 153
    • Cetinkaya, B.1    Ozdemir, I.2    Dixneuf, P.H.3
  • 30
    • 10344266578 scopus 로고    scopus 로고
    • Note that these experiments were carried out in toluene under conditions where the formation of Wilkinson's catalysts was not taking place (vide infra)
    • Note that these experiments were carried out in toluene under conditions where the formation of Wilkinson's catalysts was not taking place (vide infra).
  • 32
    • 10344236632 scopus 로고    scopus 로고
    • 1 for intermolecular exchange) [17]
    • 1 for intermolecular exchange) [17]
  • 35
    • 10344247839 scopus 로고    scopus 로고
    • Trace amounts of water accelerate production of Wilkinson's catalyst dramatically. All of the experiments described herein are carried out in flame sealed NMR tubes prepared using standard Schlenk techniques and rigorously deoxygenated samples
    • Trace amounts of water accelerate production of Wilkinson's catalyst dramatically. All of the experiments described herein are carried out in flame sealed NMR tubes prepared using standard Schlenk techniques and rigorously deoxygenated samples.
  • 36
    • 10344250063 scopus 로고    scopus 로고
    • 2 [9b]. The positions of several of the protons are diagnostic and show definitively that this species is not present in the 60 °C reaction or in the 25 °C reaction. Since there is a considerable difference between the tetramethyl carbene Kuhn employed and IMes which we have employed, a difference in reactivity may be reasonable
  • 41
    • 10344242572 scopus 로고    scopus 로고
    • Note that carbene complex 2 is stable in THF at 25 and 60 °C
    • Note that carbene complex 2 is stable in THF at 25 and 60 °C
  • 44
    • 10344227342 scopus 로고    scopus 로고
    • The rate does not increase to the same level as Wilkinson's itself (entry 3) because the short time frame of the experiment (30 min) allows only partial formation of Wilkinson's catalyst from 2a
    • The rate does not increase to the same level as Wilkinson's (entry 3) because the short time frame of the experiment (30 min) allows only partial formation of Wilkinson's catalyst from 2a.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.