Cyclobutadiene Dianions Consisting of Heavier Group 14 Elements: Synthesis and Characterization

Journal of the American Chemical Society

Volumn 126, Issue 15, 2004, Pages 4758-4759

  Lee, Vladimir Ya ^a   Takanashi, Kazunori ^a   Matsuno, Tadahiro ^a   Ichinohe, Masaaki ^a   Sekiguchi, Akira ^a  

^a UNIVERSITY OF TSUKUBA   (Japan)

Author keywords

[No Author keywords available]

Indexed keywords

ANION; CYCLOBUTADIENE DIANION; CYCLOBUTANE; UNCLASSIFIED DRUG;

ARTICLE; CHEMICAL ANALYSIS; CHEMICAL STRUCTURE; CRYSTAL STRUCTURE; CRYSTALLOGRAPHY; MAGNETISM; NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY; SYNTHESIS; X RAY ANALYSIS;

EID: 1842841120     PISSN: 00027863     EISSN: None     Source Type: Journal    
DOI: 10.1021/ja030662z     Document Type: Article

References (19)

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11. 8, δ) 5.3, 20.8, 113.7 (skeletal Si atoms).
12. 29Si DEPT NMR techniques.
13. 2- was determined by X-ray analysis, we do not discuss its structural parameters due to unsatisfactory refinement.
14. o) (Rw = 0.1535 for all data, 31807 reflections), GOF = 1.018.
15. The typical Si-K bond distances lie in the range 3.31-3.42 Å, which corresponds well with the sum of the covalent radii for Si and K atoms (3.38 Å), see: Jenkins, D. M.; Teng, W.; Englich, U.; Stone, D.; Ruhland-Senge, K. Organometallics 2001, 20, 4600.
16. 2- ring more planar and more aromatic.
17. Schleyer, P. v. R.; Maerker, G.; Dransfeld, A.; Jiao, H.; Hommes, N. J. R. v. E. J. Am. Chem. Soc. 1996, 118, 6317.
18. 2- at 1 Å above the center of the rings [NICS(1)].
19. 6: C, 53.02; H, 10.54. Found: C, 53.33; H, 10.28.