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Volumn , Issue 12, 1999, Pages 1929-1935

Phenyl tris(3-tert-butylpyrazolyl)borato complexes of lithium and thallium, [PhTpBut]M (M = Li, Tl): A novel structure for a monomeric tris(pyrazolyl)boratothallium complex and a study of its stereochemical nonrigidity by 1H and 205Tl NMR spectroscopy

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EID: 33748484249     PISSN: 03009246     EISSN: None     Source Type: Journal    
DOI: 10.1039/a901875a     Document Type: Article
Times cited : (62)

References (62)
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    • For recent reviews, see: (a) S. Trofimenko, Chem. Rev., 1993, 93, 943;
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    • note
    • The abbreviations adopted here for tris(pyrazolyl)hydroborato ligands are based on those described by Trofimenko [ref. 1(a)]. Thus, the tris(pyrazolyl)hydroborato ligands are represented by the abbreviation Tp, with the 3- and 5-alkyl substituents listed respectively as superscripts. If the fourth substituent on boron is anything other than hydrogen, the substituent is listed as a prefix, e.g., [pzTp] and [RTp].
  • 15
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    • ref. 5
    • (b) ref. 5;
  • 18
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    • 2 with excess pyrazole. See ref. 5
    • 2 with excess pyrazole. See ref. 5.
  • 19
    • 0000322835 scopus 로고    scopus 로고
    • 3N. Subsequent reaction of [FcTp]H with TlOEt gives the thallium complex Tl[FcTp]. F. Jäkle, K. Polborn and M. Wagner, Chem. Ber., 1996, 129, 603.
    • (1996) Chem. Ber. , vol.129 , pp. 603
    • Jäkle, F.1    Polborn, K.2    Wagner, M.3
  • 21
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    • For example, terminal alkyl, hydride, hydroxide and chalcogenide moieties have been stabilized with such ligation. See, for example, ref. 1(b) and (a) M. C. Kuchta and G. Parkin, J. Am. Chem. Soc., 1995, 117, 12651;
    • (1995) J. Am. Chem. Soc. , vol.117 , pp. 12651
    • Kuchta, M.C.1    Parkin, G.2
  • 25
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    • unpublished work
    • ButpzH) may be isolated. J. L. Kisko and G. Parkin, unpublished work.
    • Kisko, J.L.1    Parkin, G.2
  • 37
    • 33748507623 scopus 로고    scopus 로고
    • note
    • Although three coordination of lithium is less common than its ubiquitous tetrahedral coordination, it is nevertheless well precedented. For example, ca. 20% of the lithium complexes listed in the Cambridge Structural Database have a coordination number of three for lithium.
  • 38
    • 0002087304 scopus 로고
    • CSD Version 5.16, 1999, 3D Search and Research Using the Cambridge Structural Database
    • CSD Version 5.16, 1999, 3D Search and Research Using the Cambridge Structural Database, F. H. Allen and O. Kennard, Chem. Des. Automat. News, 1993, 8, pp. 1, 31-37.
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    • 0000446662 scopus 로고
    • For other examples in which intraligand interactions influence the binding mode of poly(pyrazolyl)borate complexes, see: (a) Y. Sohrin, H. Kokusen and M. Matsui, Inorg. Chem., 1995, 34, 3928;
    • (1995) Inorg. Chem. , vol.34 , pp. 3928
    • Sohrin, Y.1    Kokusen, H.2    Matsui, M.3
  • 49
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    • For example, only 7% of the structurally characterized lithium complexes listed in the Cambridge Structural Database are two coordinate
    • For example, only 7% of the structurally characterized lithium complexes listed in the Cambridge Structural Database are two coordinate.
  • 53
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    • note
    • 205Tl NMR spectroscopic signals (2:2.6 at -70°C). In view of the potentially different relaxation times for the different thallium nuclei, the integral ratio is not expected to be an accurate measure of their relative concentrations.
  • 54
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    • note
    • 2:1 could correspond to the equatorial isomer of Scenario I.
  • 57
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    • ed. A. L. Wayda and M. Y. Darensbourg, American Chemical Society, Washington, DC, ch. 2
    • (a) J. P. McNally, V. S. Leong and N. J. Cooper, in Experimental Organometallic Chemistry, ed. A. L. Wayda and M. Y. Darensbourg, American Chemical Society, Washington, DC, 1987, ch. 2, pp. 6-23;
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    • eds. A. L. Wayda and M. Y. Darensbourg, American Chemical Society, Washington, DC, ch. 4
    • (b) B. J. Burger and J. E. Bercaw, in Experimental Organometallic Chemistry, eds. A. L. Wayda and M. Y. Darensbourg, American Chemical Society, Washington, DC, 1987, ch. 4, pp. 79-98;
    • (1987) Experimental Organometallic Chemistry , pp. 79-98
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  • 61
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    • 2O (1.0, 0.5 and 0.25 M) were extrapolated to zero concentration
    • 2O (1.0, 0.5 and 0.25 M) were extrapolated to zero concentration.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.