메뉴 건너뛰기




Volumn 20, Issue 19, 2001, Pages 3983-3992

Peralkylated ytterbium(II) aluminate complexes YbAl2R8. New insights into the nature of aluminate coordination

Author keywords

[No Author keywords available]

Indexed keywords

ALIPHATIC HYDROCARBON; DENSITY FUNCTIONAL THEORY; PERETHYLATED POLYMER; PYROPHORIC POWDER; SILYLAMIDE ELIMINATION REACTION; TETRAMETHYLALUMINATE DERIVATIVE; YTTERBIUM ALUMINATE;

EID: 0035904271     PISSN: 02767333     EISSN: None     Source Type: Journal    
DOI: 10.1021/om0102091     Document Type: Article
Times cited : (63)

References (103)
  • 1
    • 0003484330 scopus 로고
    • Wilkinson, G., Stone, F. G. A., Abel, E. W., Eds.; Pergamon Press: Oxford, U. K.; Chapter 6
    • Eisch, J. J. In Comprehensive Organometallic Chemistry II; Wilkinson, G., Stone, F. G. A., Abel, E. W., Eds.; Pergamon Press: Oxford, U. K., 1995; Volume 11, Chapter 6.
    • (1995) Comprehensive Organometallic Chemistry II , vol.11
    • Eisch, J.J.1
  • 29
    • 0000953946 scopus 로고
    • (b) Weiss, E. Angew. Chem. 1993, 105, 1565-1587
    • (1993) Angew. Chem. , vol.105 , pp. 1565-1587
    • Weiss, E.1
  • 43
    • 33749110499 scopus 로고
    • 2 (R = Me, Et) were previously isolated, the methyl derivative was structurally characterized, and their activity in ethylene polymerization (20 °C, 12 atm) was revealed: Boncella, J. M.; Andersen, R. A. Organometallics 1985, 4, 205-206.
    • (1985) Organometallics , vol.4 , pp. 205-206
    • Boncella, J.M.1    Andersen, R.A.2
  • 51
    • 0011653449 scopus 로고    scopus 로고
    • note
    • 2(THF) could not be located.
  • 52
    • 0032556450 scopus 로고    scopus 로고
    • note
    • 1-bridging ethyl groups. However, the shortening of these C-C bonds might also be caused by higher librational motion and/or some degree of disorder due to the higher structural flexibility of these noncoordinated ethyl groups. Unfortunately, we could not sort out this problem by a high-resolution low-temperature X-ray study, since all investigated crystals of 3 start to powderize at temperatures below -50 °C; see: Scherer, W.; Heiringer, W.; Spiegler, M.; Sirsch, P.; McGrady, G. S.; Downs, A. J.; Haaland, A.; Pedersen, B. Chem. Commun. 1998, 2471-2472.
    • (1998) Chem. Commun. , pp. 2471-2472
    • Scherer, W.1    Heiringer, W.2    Spiegler, M.3    Sirsch, P.4    McGrady, G.S.5    Downs, A.J.6    Haaland, A.7    Pedersen, B.8
  • 53
    • 0011593142 scopus 로고    scopus 로고
    • note
    • 13C NMR spectra are rather small.
  • 56
    • 0004157499 scopus 로고
    • Oxford University Press: Oxford, U.K.; International Series of Monographs on Chemistry
    • Bader, R. F. W. Atoms in Molecules: A Quantum Theory; Oxford University Press: Oxford, U.K., 1990; International Series of Monographs on Chemistry, Vol. 22.
    • (1990) Atoms in Molecules: A Quantum Theory , vol.22
    • Bader, R.F.W.1
  • 58
    • 0000785875 scopus 로고
    • note
    • 3-symmetric complexes a strongly distorted prismatic ligand arrangement is observed with two sets of Me-M-Me angles and Me-M distances. See: (a) Haaland, A.; Hammel, A.; Rypdal, K.; Volden, H.-V. J. Am. Chem. Soc. 1990, 112, 4547-4549.
    • (1990) J. Am. Chem. Soc. , vol.112 , pp. 4547-4549
    • Haaland, A.1    Hammel, A.2    Rypdal, K.3    Volden, H.-V.4
  • 59
  • 63
    • 0011595546 scopus 로고    scopus 로고
    • note
    • c) is found to be greater than unity.
  • 67
    • 36549102661 scopus 로고
    • note
    • 1. We have therefore used the expression "polarization of the outer shell of the core of the Y atom" to account for the occurrence of CPs in the fourth shell of the Y atom. However, valence shell electrons and outer core electrons, as defined by the orbital model, cannot be distinguished on the basis of the Laplacian for elements beyond argon (see, e.g.: Sagar, R. P.; Ku, A. C. T.; Smith, V. H., Jr.; Simas, A. M. J. Chem. Phys. 1988, 88, 4367-4374).
    • (1988) J. Chem. Phys. , vol.88 , pp. 4367-4374
    • Sagar, R.P.1    Ku, A.C.T.2    Smith V.H., Jr.3    Simas, A.M.4
  • 68
    • 0025574534 scopus 로고
    • note
    • Indeed, studies comparing the results of calculations using all-electron bais sets or effective core potentials have clearly demonstrated that the occurrence of CPs in the outer shell of elements beyond argon has to be attributed mainly to a polarization of the valence electrons and outer core electrons MacDougall, P. J.; Hall, M. B. Trans. Am. Crystallogr. Assoc. 1990, 26, 105-123.
    • (1990) Trans. Am. Crystallogr. Assoc. , vol.26 , pp. 105-123
    • MacDougall, P.J.1    Hall, M.B.2
  • 70
    • 0011529121 scopus 로고    scopus 로고
    • note
    • We note that in the case of 5 even six local charge concentrations are observed. It remains to be clarified whether the different numbers of these domains (six in 5 and five in 6) and their mutual arrangements are a consequence of the different bridging groups (methyl vs ethyl) attached to the Y center. Indeed, the calculated Y-C bond distances in 5 are ∼0.02 Å shorter than those in 6, suggesting a stronger Y-C bonding in 5. Thus, the ligand-induced charge polarization in 5 might be more pronounced compared with 6, causing the formation of six CCs in 5 vs. five CCs in 6.
  • 71
    • 0011595225 scopus 로고    scopus 로고
    • note
    • We note that in the case of 5 six CCs form a slightly distorted trigonal antiprism.
  • 85
    • 0011530188 scopus 로고    scopus 로고
    • Ph.D. Thesis, Technische Universität München
    • (b) Görlitzer, H. W. Ph.D. Thesis, Technische Universität München, 1999.
    • (1999)
    • Görlitzer, H.W.1
  • 88
    • 0011653453 scopus 로고    scopus 로고
    • "Collect" data collection software; Nonius BV, Delft, The Netherlands
    • (a) "Collect" data collection software; Nonius BV, Delft, The Netherlands, 1998.
    • (1998)
  • 89
    • 0031059866 scopus 로고    scopus 로고
    • Processing of X-ray diffraction data collected in oscillation mode
    • Carter, C. W., Jr., Sweet, R. M., Eds.; Academic Press: San Diego, CA; Macromolecular Crystallography
    • (b) Otwinowski, Z.; Minor, W. Processing of X-ray Diffraction Data Collected in Oscillation Mode. Methods in Enzymology; Carter, C. W., Jr., Sweet, R. M., Eds.; Academic Press: San Diego, CA, 1997; Volume 276, Macromolecular Crystallography, Part A, pp 307-326.
    • (1997) Methods in Enzymology , vol.276 , Issue.PART A , pp. 307-326
    • Otwinowski, Z.1    Minor, W.2
  • 92
    • 0003872738 scopus 로고
    • Wilson, A. J. C., Ed.; Kluwer Academic: Dordrecht, The Netherlands; Tables 6.1.1.4 (pp 500-502), 4.2.6.8 (pp 219-222), and 4.2.4.2 (pp 193-199)
    • International Tables for Crystallography; Wilson, A. J. C., Ed.; Kluwer Academic: Dordrecht, The Netherlands, 1992; Vol. C, Tables 6.1.1.4 (pp 500-502), 4.2.6.8 (pp 219-222), and 4.2.4.2 (pp 193-199)
    • (1992) International Tables for Crystallography , vol.C
  • 94
    • 0003562849 scopus 로고    scopus 로고
    • Crystallographic Institute, University of Freiburg, Freiburg, Germany
    • Keller, E. SCHAKAL; Crystallographic Institute, University of Freiburg, Freiburg, Germany, 1988.
    • (1998) SCHAKAL
    • Keller, E.1
  • 96
    • 4243553426 scopus 로고
    • Becke, A. D. Phys. Rev. 1988, A38, 3098-3100.
    • (1988) Phys. Rev. , vol.A38 , pp. 3098-3100
    • Becke, A.D.1
  • 103
    • 0003401652 scopus 로고    scopus 로고
    • XD, Computer program package for multipole refinement and analysis of electron densities from diffraction data
    • Free University of Berlin, Berlin, Germany, June
    • Koritsanszky, T.; Howard, S. T.; Su, Z.; Mallinson, P. R.; Richter, T.; Hansen, N. K. XD, Computer Program Package for Multipole Refinement and Analysis of Electron Densities from Diffraction Data; Free University of Berlin, Berlin, Germany, June 1997.
    • (1997)
    • Koritsanszky, T.1    Howard, S.T.2    Su, Z.3    Mallinson, P.R.4    Richter, T.5    Hansen, N.K.6


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.