New sterically crowded phosphaferrocene and -ruthenocene derivatives were synthesized via the 2,5-bis(trimethylsilyl)phospholide anion 5. Their reactivity with regard to the exchange of the Me3Si groups for other functional groups was examined. X-ray structures were determined for the mono- (6) and the 1,1′-diphosphaferrocene (8). The activation barrier for ring–ring rotation in 8 was determined by
通过 2,5-双(三甲基甲
硅烷基)
磷化物阴离子 5 合成了新的空间拥挤的
磷酸二茂铁和 -
钌茂衍
生物。研究了它们在 Me3Si 基团与其他官能团交换方面的反应性。确定了单- (6) 和 1,1'-二
磷酸二茂铁 (8) 的 X 射线结构。8 中环-环旋转的激活势垒由核磁共振光谱确定并得到 DFT 计算的支持。通过亲电取代制备 2,5-双功能
磷酸二茂铁的尝试未成功,但在途中产生了一种新的双齿 P,P
配体 (3) 及其 Mo(CO)4 配合物,它们均通过 X 射线衍射表征。(© Wiley-
VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)