메뉴 건너뛰기




Volumn 29, Issue 23, 2010, Pages 6267-6281

Experimental and theoretical study of a tungsten dihydride silyl complex: New insight into its bonding nature and fluxional behavior

Author keywords

[No Author keywords available]

Indexed keywords

ACTIVATION ENERGY; BEARINGS (STRUCTURAL); CHEMICAL BONDS; HYDRIDES; MOLECULAR ORBITALS; NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY; OXIDATION; SILICATES; SILICON; SPECTROSCOPIC ANALYSIS; TUNGSTEN; X RAY CRYSTALLOGRAPHY;

EID: 84962425727     PISSN: 02767333     EISSN: 15206041     Source Type: Journal    
DOI: 10.1021/om100653v     Document Type: Article
Times cited : (23)

References (165)
  • 97
    • 84962358482 scopus 로고    scopus 로고
    • For an Si - -H distance of 1.6-1.8 Å, a σ-silane complex was proposed, but for longer values up to 2.1 Å, the presence of a nonclassical silyl-hydride interaction was proposed; see ref 30d. For example, here, we discuss not σ-silane complexes but the complexes bearing a longer Si-H interaction, though it is not easy to perfectly separate these two kinds of complexes
    • For an Si - -H distance of 1.6-1.8 Å, a σ-silane complex was proposed, but for longer values up to 2.1 Å, the presence of a nonclassical silyl-hydride interaction was proposed; see ref 30d. For example, here, we discuss not σ-silane complexes but the complexes bearing a longer Si-H interaction, though it is not easy to perfectly separate these two kinds of complexes.
  • 116
    • 84962358531 scopus 로고    scopus 로고
    • A double Si-H bonding interaction was reported in some Ru dihydride silyl complexes; see refs 20e and 20j, and footnote 30 of ref 20n. Two Si-H interactions are reported in some polyhydride silyl complexes of Ru, which are called SISHA interactions, in which two Si - -H distances are not equivalent; see ref 30d
    • A double Si-H bonding interaction was reported in some Ru dihydride silyl complexes; see refs 20e and 20j, and footnote 30 of ref 20n. Two Si-H interactions are reported in some polyhydride silyl complexes of Ru, which are called SISHA interactions, in which two Si - -H distances are not equivalent; see ref 30d.
  • 121
    • 84962437516 scopus 로고    scopus 로고
    • HH coupling constant from the spectrum at this temperature because of their signal broadening due to fluxional behavior
    • HH coupling constant from the spectrum at this temperature because of their signal broadening due to fluxional behavior.
  • 138
    • 84962472504 scopus 로고    scopus 로고
    • Translational and rotational movements are considerably suppressed in solution, compared to those in the gas phase, suggesting that the entropy by the translational and rotational movements is overestimated in the present evaluations. However, the error by the overestimation is not very large because a unimolecular reaction is investigated here; in other words, the error is canceled among the reactant, the transition state, and the product
    • Translational and rotational movements are considerably suppressed in solution, compared to those in the gas phase, suggesting that the entropy by the translational and rotational movements is overestimated in the present evaluations. However, the error by the overestimation is not very large because a unimolecular reaction is investigated here; in other words, the error is canceled among the reactant, the transition state, and the product.
  • 142
    • 0038626673 scopus 로고    scopus 로고
    • Revision C.02; Gaussian Inc.: Wallingford, CT,. See ref S3 of Supporting Information for complete reference of Gaussian 03
    • Pople, J. A.; et al. Gaussian 03, Revision C.02; Gaussian Inc.: Wallingford, CT, 2004. See ref S3 of Supporting Information for complete reference of Gaussian 03.
    • (2004) Gaussian 03
    • Pople, J.A.1
  • 145
    • 0034355284 scopus 로고    scopus 로고
    • MOLEKEL, An Interactive Molecular Graphics Tool
    • Portmann, S.; Lüthi, H. P. MOLEKEL, An Interactive Molecular Graphics Tool. CHIMIA 2000, 54, 766 - 770.
    • (2000) CHIMIA , vol.54 , pp. 766-770
    • Portmann, S.1    Lüthi, H.P.2
  • 149
    • 84962410482 scopus 로고    scopus 로고
    • 1 of 0.1243, because the recrystallization of R1 using various solvents always gave thin scales. The analysis however was sufficient for assigning atom connectivity and the structural characteristics of R1. For details of the X-ray analysis of R1, see the Supporting Information
    • 1 of 0.1243, because the recrystallization of R1 using various solvents always gave thin scales. The analysis however was sufficient for assigning atom connectivity and the structural characteristics of R1. For details of the X-ray analysis of R1, see the Supporting Information.
  • 150
    • 84962364983 scopus 로고    scopus 로고
    • Based on a search of the Cambridge Structural Database, CSD
    • Based on a search of the Cambridge Structural Database, CSD (2007).
    • (2007)
  • 152
    • 84962336540 scopus 로고    scopus 로고
    • note
    • -.
  • 153
    • 84962336529 scopus 로고    scopus 로고
    • 3 (5), by the DFT/BS-I method
    • 3 (5), by the DFT/BS-I method.
  • 158
    • 84962336414 scopus 로고    scopus 로고
    • note
    • The DFT/BS-III-calculated potential energy and free energy changes in the gas phase are presented before and after the slash, respectively. The DFT/BS-II-, MP4(SDTQ)/BS-II-, and CCSD(T)/BS-II-calculated potential energy changes in the gas phase are presented in brackets in this order.
  • 159
    • 84962405751 scopus 로고    scopus 로고
    • The DFT/BS-III-calculated potential energy change in the gas phase is presented without brackets, and the DFT/BS-II-, MP4(SDTQ)/BS-II-, and CCSD(T)/BS-II-calculated potential energy changes in the gas phase are presented in brackets in this order
    • The DFT/BS-III-calculated potential energy change in the gas phase is presented without brackets, and the DFT/BS-II-, MP4(SDTQ)/BS-II-, and CCSD(T)/BS-II-calculated potential energy changes in the gas phase are presented in brackets in this order.
  • 160
    • 84962418948 scopus 로고    scopus 로고
    • note
    • The DFT/BS-III-calculated potential energy in the gas phase and free energy changes are presented before and after the slash, respectively. The DFT/BS-III-calculated potential energy change with the solvation effect is presented in parentheses. Because not this transition state but the other one directly relates to the H1-H2 position change, we did not perform MP4(SDTQ) and CCSD(T) calculations here.
  • 161
    • 84962405753 scopus 로고    scopus 로고
    • note
    • 1a-1b is somewhat shorter than those of 1a and 1b but much longer than that of a typical silicate.
  • 163
    • 84962336381 scopus 로고    scopus 로고
    • In 1, Cp ligand is occupying three coordination sites of W
    • In 1, Cp ligand is occupying three coordination sites of W.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.