molecular structure has been determined by X-ray crystallography. In the solid state, the phosphorus atoms are separated by 5.333(1) Å. NMR investigations reveal an unexpected “through-space” JPP' coupling constant of 8.0 Hz and also show that, in solution, the calixarene is conformationally mobile, the phenoxy ring flipping rapidly through the calixarene annulus. The spatial proximity of the two phosphorus
大,不对称
二膦5,11,17,23-四-叔丁基- 25,26 -二(diphenylphosphinomethoxy)-27(或28) -苯甲酰氧-28(或27)-hydroxycalix [4]
芳烃,其中
磷原子被十个键隔开,是通过单苯甲酰化制得的5,11,17,23-四-叔丁基- 25,26 -二(diphenylphosphinoylmethoxy)-27,28 -二(羟基)杯[4]
芳烃, 其次是 减少 和 苯基
硅烷。其分子结构已由X射线晶体学。在固态状态下,
磷原子的间距为5.333(1)。NMR研究显示出意外的“贯穿空间” J PP'耦合常数为8.0 Hz,并且还表明,在溶液中,杯
芳烃 在构象上是可移动的,苯氧基环迅速翻过 杯
芳烃环。两个
磷原子的空间接近由容易获得的的进一步证实顺-螯合物配合物[将Pd(η 3 -C 3 H ^ 4 ME)(THF)2 ] BF 4(THF =
四氢呋喃)。