[Me(PhMe2Si)2SiLi] and [Ph(Me3Si)2SiLi]: Preparation, Characterization, and Evidence for an Intramolecular Li-Ph Interaction

Angewandte Chemie (International Edition in English)

Volumn 36, Issue 1-2, 1997, Pages 113-115

  Sekiguchi, Akira ^a   Nanjo, Masato ^c   Kabuto, Chizuko ^c   Sakurai, Hideki ^b  

^a UNIVERSITY OF TSUKUBA   (Japan)

^b UNIVERSITY OF TOKYO   (Japan)

^c TOHOKU UNIVERSITY   (Japan)

Author keywords

Lithium; Oligosilanes; Silicon; interactions

Indexed keywords

EID: 0030787880     PISSN: 05700833     EISSN: None     Source Type: Journal    
DOI: 10.1002/anie.199701131     Document Type: Article

References (20)

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8. a) T. F. Schaaf, W. Butler, M. D. Glick, J. P. Oliver, J. Am. Chem. Soc. 1974, 96, 7593-7594;
9. b) W. H. Ilsley, T. F. Schaaf, M. D. Glick, J. P. Oliver, ibid. 1980, 102, 3769-3774.
10. A. Sekiguchi, M. Nanjo, C. Kabuto, H. Sakurai, Organometallics, 1995, 14, 2630-2632.
11. The silyllithium 1 a has been shown to be a versatile reagent for polysilane dendrimers see A. Sekiguchi, M. Nanjo, C. Kabuto, H. Sakurai, J. Am. Chem. Soc. 1995, 117, 4195-4196.
12. 8]toluene, LiCl in MeOH, external): δ= -0.42.
13. 0). Further details of the crystal structure investigation may be obtained from the Fachinformationszentrum Karlsruhe, D-76344 Eggenstein-Leopoldshafen (Germany), on quoting the depository number CSD-59374.
14. W. N. Setzer, P. von R. Schleyer, Adv. Organomet. Chem. 1985, 24, 353-450.
15. 7Li NMR signals of lithiosilanes are typically observed at around δ = 2.2 in hydrocarbon solvents, whereas these resonances appear at around δ= 0.5 in THF due to disruption of the aggregates by complication with THF. see ref. [4] and U. Edlund, T. Lejon, P. Pyykkö, T. K. Venkatachalam, E. Buncel, J. Am. Chem. Soc. 1987, 109, 5982-5985.
16. 2SiLi in THF appear at δ = 0.66, 0.61, and 0.53, respectively (ref. [9]).
17. For the recent papers concerning interactions between alkali metal ions and phenyl groups see: a) A. Sekiguchi, M. Ichinohe, T. Nakanishi, C. Kabuto, H. Sakurai, Bull. Chem. Soc. Jpn. 1995, 68, 3215-3220; b) H. Bock, K. G. Hubmann, C. Näther, N. Nagel, Z. Havlas, Angew. Chem. 1996, 108, 720-722; Angew. Chem. Int. Ed. Engl. 1996, 35, 631-632; c) H. Bock, T. Hauck, C. Näther, Organometallics 1996, 15, 1527-1529.
18. For the recent papers concerning interactions between alkali metal ions and phenyl groups see: a) A. Sekiguchi, M. Ichinohe, T. Nakanishi, C. Kabuto, H. Sakurai, Bull. Chem. Soc. Jpn. 1995, 68, 3215-3220; b) H. Bock, K. G. Hubmann, C. Näther, N. Nagel, Z. Havlas, Angew. Chem. 1996, 108, 720-722; Angew. Chem. Int. Ed. Engl. 1996, 35, 631-632; c) H. Bock, T. Hauck, C. Näther, Organometallics 1996, 15, 1527-1529.
19. For the recent papers concerning interactions between alkali metal ions and phenyl groups see: a) A. Sekiguchi, M. Ichinohe, T. Nakanishi, C. Kabuto, H. Sakurai, Bull. Chem. Soc. Jpn. 1995, 68, 3215-3220; b) H. Bock, K. G. Hubmann, C. Näther, N. Nagel, Z. Havlas, Angew. Chem. 1996, 108, 720-722; Angew. Chem. Int. Ed. Engl. 1996, 35, 631-632; c) H. Bock, T. Hauck, C. Näther, Organometallics 1996, 15, 1527-1529.
20. For the recent papers concerning interactions between alkali metal ions and phenyl groups see: a) A. Sekiguchi, M. Ichinohe, T. Nakanishi, C. Kabuto, H. Sakurai, Bull. Chem. Soc. Jpn. 1995, 68, 3215-3220; b) H. Bock, K. G. Hubmann, C. Näther, N. Nagel, Z. Havlas, Angew. Chem. 1996, 108, 720-722; Angew. Chem. Int. Ed. Engl. 1996, 35, 631-632; c) H. Bock, T. Hauck, C. Näther, Organometallics 1996, 15, 1527-1529.