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Volumn 46, Issue 25, 2007, Pages 10717-10723

C3-symmetric trinuclear molybdenum cluster sulfides: Configurational stability, supramolecular stereocontrol, and absolute configuration assignment

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EID: 37349042470     PISSN: 00201669     EISSN: None     Source Type: Journal    
DOI: 10.1021/ic701522p     Document Type: Article
Times cited : (20)

References (96)
  • 27
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    • This last possibility allows a thermodynamic check-up of the three successive ring-closures at elevated temperatures, leading to a single diastereoisomer, that diastereomer being then completely inert at room temperature
    • This last possibility allows a thermodynamic "check-up" of the three successive ring-closures at elevated temperatures, leading to a single diastereoisomer, that diastereomer being then completely inert at room temperature.
  • 76
    • 37349074633 scopus 로고    scopus 로고
    • A good balance between high polarity solvent conditions for solubility and a low polarity medium for effective enantiodifferentiation was provided by mixtures of CD3CN 3-10, in C6D6
    • 6.
  • 77
    • 0037450928 scopus 로고    scopus 로고
    • TRISPHAT anion is particularly effective for the recognition of cationic bisaryl or trisaryl phosphorus derivatives. See refs 10 and 13 and Hebbe, V, Londez, A, Goujon-Ginglinger, C, Meyer, F, Uziel, J, Jugé, S, Lacour, J. Tetrahedron Lett. 2003, 44, 2467-2471
    • TRISPHAT anion is particularly effective for the recognition of cationic bisaryl or trisaryl phosphorus derivatives. See refs 10 and 13 and Hebbe, V.; Londez, A.; Goujon-Ginglinger, C.; Meyer, F.; Uziel, J.; Jugé, S.; Lacour, J. Tetrahedron Lett. 2003, 44, 2467-2471.
  • 78
    • 37349088038 scopus 로고    scopus 로고
    • From the latter experiment, a maximum value for the energy barrier of enantiomerization of the cluster cation can be estimated. Assuming that it takes 10 half-lives to reach equilibrium, the maximum half-life for the enantiomerization can be estimated as 24 min at 72°C. This in turn corresponds to an upper limit for the energy of enantiomerization of 25.5 kcal/mol.
    • From the latter experiment, a maximum value for the energy barrier of enantiomerization of the cluster cation can be estimated. Assuming that it takes 10 half-lives to reach equilibrium, the maximum half-life for the enantiomerization can be estimated as 24 min at 72°C. This in turn corresponds to an upper limit for the energy of enantiomerization of 25.5 kcal/mol.
  • 82
    • 37349122018 scopus 로고    scopus 로고
    • At room temperature, chiroptical characterization of the mother liquor indicates a lack of further racemization of TRISPHAT anion
    • At room temperature, chiroptical characterization of the mother liquor indicates a lack of further racemization of TRISPHAT anion.
  • 83
    • 21844478737 scopus 로고    scopus 로고
    • TRISPHAT chromophores absorb under 270 nm, see: Bas, D.; Bürgi, T.; Lacour, J.; Vachon, J.; Weber, J. Chirality 2005, 17, S143-S148. All Cotton effects observed above this threshold are those of the nonracemic cationic complexes.
    • TRISPHAT chromophores absorb under 270 nm, see: Bas, D.; Bürgi, T.; Lacour, J.; Vachon, J.; Weber, J. Chirality 2005, 17, S143-S148. All Cotton effects observed above this threshold are those of the nonracemic cationic complexes.
  • 84
    • 37349048405 scopus 로고    scopus 로고
    • Preferred heterochiral associations have already been observed in the presence of TRISPHAT anions either in solution or in the solid state. See refs 13 and 14
    • Preferred heterochiral associations have already been observed in the presence of TRISPHAT anions either in solution or in the solid state. See refs 13 and 14.
  • 85
    • 37349110217 scopus 로고    scopus 로고
    • 5.0 ed, ray Systems; Madison, WI
    • SAINT, 5.0 ed.; Bruker Analytical X-ray Systems; Madison, WI, 1996.
    • (1996) SAINT
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    • Sheldrick, G. M. SHELXTL, 5.1 ed.; Broker Analytical X-ray Systems: Madison, WI, 1997.
    • Sheldrick, G. M. SHELXTL, 5.1 ed.; Broker Analytical X-ray Systems: Madison, WI, 1997.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.