Synthesis and properties of me2ge-bridged arènes

Chemische Berichte

Volumn 130, Issue 3, 1997, Pages 421-424

  König, Burkhard ^a   Rodel, Martin ^a  

^a TECHNICAL UNIVERSITY OF BRAUNSCHWEIG   (Germany)

Author keywords

Germanium; Macrocycles; Uv vis spectroscopy

Indexed keywords

EID: 19044380244     PISSN: 00092940     EISSN: None     Source Type: Journal    
DOI: 10.1002/cber.19971300318     Document Type: Article

References (18)

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2. Angcw. Clwin. Int. Ed Engl. 1995, 34, 661-662.
3. [1b] B. König, M. Rodel, P. Bubenitschek, P. G. Jones, I. Thondorf, J. Org. Cliem. 1995, 60, 7406-7410.
4. [1c] B. Konic, J. Prakt. Clicm. 1995, 337, 688-689.
5. [2a] Th. KaufTmann, H.-H. Kniese, Tetrahedron Lett. 1973, 14, 4043-4046.
6. [2b] P. Chicart, R. J. P. Corriu, J. E. Moreau, F. Gamier, A. Yassar, in Inorganic and Organoinetallic Polymers with Special Properties; R. M. Laine, (Ed.); NATO ASI Series, 1992; Vol. 206, pp. 179-190.
7. The dimers 2a and 2b have been previously reported: E. Liepins, J. Zicmane, L. Ignatovich, E. Lukevics, J. Organomet. Chem. 1990, 389, 23-28.
8. L. Brandsma, Preparative Polar Organoinetallic Chemistry 1, Springer, Berlin, 1990.
9. [4b] B. J. Wakefield; Organoliihium Met/toils, Academic Press, London, 1988; thipphene is sufficiently acidic to be deprotonated at the 2,5-positions by n-BuLi/ TMEDA in hexane.
10. [5a] The simple spectra of the highly symmetrical macrocycles allows their identification even in complex mixtures of oligomers.
11. [5b] B. Dietrich, P. Viout, J.-M. Lehn, Macrocyclic Chemistry, VCH, 1993.
12. [6a] H.-G. Elias, Makromoleküle, Bd. l, Hüthig & Wepf, Basel, 1990, p. 817-820.
13. [6b] The molecular mass (g/mol) calculated from the retention time vs polystyrene standards is in good agreement with the molecular weight determined by mass spectroscopy for compound 4 (MS: 727; GPC: 737), whereas a larger deviation was found for compound 11 (MS: 955; GPC: 769).
14. 3CN) = 216 nm.
15. [7b] V. H. Brown, W. N. French, Can. J. Clicin. 1958, 36, 371-377.
16. [7c] J. Nagy, P. Hencsei, E. Z. Gergö, Anorg. Allg. Client. 1969, 367, 293-302.
17. U. Weidner, A. Schweig, Angcw. Client. 1972, 84, 550; Angew. Client. Int. Ed Engl. 1972, //, 536.
18. Compounds 4 and 11 were only obtained in small amounts. Therefore no elemental analysis was possible. The purity of the compounds was confirmed by HPLC-analysis. Their identity was unambiguously shown by the molecular ion isotope pattern from mass spectra.