Transition Metal Complexes of Boron
β Scribed by Holger Braunschweig
- Publisher
- John Wiley and Sons
- Year
- 1998
- Tongue
- English
- Weight
- 401 KB
- Volume
- 37
- Category
- Article
- ISSN
- 0044-8249
No coin nor oath required. For personal study only.
π SIMILAR VOLUMES
10 ml, and chromatographed on a silica gel column (Merck 0.05 to 0.2 mm; column dimensions 40 x 2 cm) at 0Β°C with hexane/benzene (4 : 1). The yellow zone is collected, the solvent removed in a high vacuum, and the residue recrystallized twice from n-pentane : pale yellow needles, m. p. 45 "C ; yield
from a benzene solution at room temperature. 1 H NMR (400.1 MHz, C 6 D 6 ): d = 2.71Γ2.60 (m, 6 H, Cy), 2.23Γ2.15 (m, 12 H, Cy), 1.81Γ1.20 (m, 48 H, Cy); 11 B{ 1 H} NMR (128.4 MHz, C 6 D 6 ): d = 30 ppm; 13 C{ 1 H} NMR (100.6 MHz, C 6 D 6 ): d = 35.8 (vt, N =j 1 J P-C + 3 J P-C j= 28 Hz, C 1 Cy), 30