Synthesis and structure of a monomeric magnesium phenylselenolate complex [Tpp-Tol] MgSePh supported by tris (3-p-tolylpyrazolyl)hydroborato ligation

Polyhedron

Volumn 16, Issue 7, 1997, Pages 1255-1257

  Ghosh, Prasenjit ^a   Parkin, Gerard ^a  

^a Columbia University ^*  (United States)

Author keywords

Chalcogen; Magnesium; Selenium; Selenolate

Indexed keywords

EID: 0001094622     PISSN: 02775387     EISSN: None     Source Type: Journal    
DOI: 10.1016/S0277-5387(96)00409-3     Document Type: Article

References (23)

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4. For some examples of magnesium selenolate complexes that have not been structurally characterized, see: Petragnani, N. Chem. Ber. 1963, 96, 247 ;
5. du Mont, W.-W., Kubinok, S., Lange, L., Pohl, S., Saak W., and Wagner, I. Chem. Ber. 1991, 124, 1315.
6. Trofimenko, S. Chem. Rev. 1993, 93, 943 ;
7. Parkin, G. Adv. Inorg. Chem. 1995, 42, 291 ;
8. Kitajima, N. and Tolman, W. B. Prog. Inorg. Chem. 1995, 43, 419.
9. The abbreviations adopted here for tris (pyrazolyl)hydroborato ligands are based on those described by Trofimenko (ref. 5). Thus, the tris(pyrazolyl)hydroborato ligands are represented by the abbreviation Tp, with the 3- and 5-alkyl substituents listed respectively as superscripts.
10. Han, R. and Parkin, G. J. Am. Chem. Soc. 1992, 114, 748.
11. Chisholm has recently employed the ethoxide derivative as single-site catalyst for the ring-opening polymerization of poly(dilactide). See: M. H. Chisholm and N. W. Eilerts, J. Chem. Soc., Chem. Commun. 1996, 853.
12. Ghosh, P. and Parkin, G. J. Chem. Soc., Chem. Commun. 1996, 1239.
13. 1H NMR shifts that we observe [10b] differ slightly from those reported in the literature [10a,c]. (a) Davis, F. A., Stringer, O. D. and McCauley, J. P. Jr., Tetrahedron, 1985, 41, 4747 ;
14. 6 : δ 200;
15. 3 : δ 2.6 (s, 3H, Me), 7.1-7.6 (m, 5H, Ph)
16. Campbell, T. W. and McCullogh, J. D. J. Am. Chem. Soc. 1945, 67, 1965.
17. 3 and Z = 4.
18. Pauling, L. The Nature oj the Chemical Bond, 3rd edn. Cornell University Press, Ithaca, 1960, p. 246.
19. For comparison, the mean M - Se - aryl bond angle of complexes listed in the Cambridge Structural Database (version 5.11) is 105 .
20. 2Se is bent [116.1(1) ]
21. (a) Albrecht, N., Hübener, P., Behrens, U. and Weiss, E. Chem. Ber. 1985, 118, 4059;
22. (b) Küllmer, V., Röttinger, E. and Vahrenkamp, H. Z. Naturforsch. 1979, 34B, 217.
23. Piers, W. E., Ferguson, G. and Gallagher, J. F. Inorg. Chem. 1994, 33, 3784.