Aminophosphanes with bulky amino groups: Molecular structure, coupling constants<sup>1</sup><i>J</i>(<sup>31</sup>P,<sup>15</sup>N) and<sup>2</sup><i>J</i>(<sup>31</sup>P,<sup>29</sup>Si), and isotope-induced chemical shifts<sup>1</sup>Δ<sup>14/15</sup>N(<sup>31</sup>P)
作者:Bernd Wrackmeyer、Christian Köhler、Wolfgang Milius、Jean Michel Grevy、Zureima García-Hernández、Rosalinda Contreras
DOI:10.1002/hc.10084
日期:——
13C, 15N, 29Si, and 31P NMR spectroscopy. In all cases, the more bulky substituent at the nitrogen atom prefers the syn-position with respect to the assumed orientation of the phosphorus lone pair of electrons. Many of the derivatives studied adopt this preferred conformation even at room temperature. Numerous signs of coupling constants 1J(31P, 15N), 2J(31P, 13C), and 2J(31P, 29Si) were determined
具有大氨基 (1-20) 的氨基膦的优选构象是通过溶液中的 NMR 光谱确定的,在两种情况下为固态 (11,17),在一种情况下 (11) 通过 X 射线晶体学。三甲基甲硅烷基氨基二苯基膦 Ph2PN(R)SiMe3 (R = Bu (1), Ph (2), 2-吡啶基 (3), 2-嘧啶基 (4), Me3Si (5)), 氨基(氯)苯基膦 Ph(Cl)PNRR' (R = Bz, R' = Me (6), R = Bz, R' = tBu (7), R = Et, R' = Ph (8)), 氨基(氯)叔丁基膦 tBu(Cl)PNRR ' (R = R' = iPr (9), R = Me, R' = tBu (10), R = Bz, R' = tBu (11), R = H, R' = tBu (12), R = Et, R' = Ph (13), R = iPr, R' = Ph