reveal a P2C2Al ring with a tetracoordinated aluminum atom, two exocyclic C═C double bonds, a tricoordinated phosphorus atom, and a phosphonium cation carrying an aryl and an alkynyl group. The C≡C triple bond of 7 was inserted into the Al−P bonds of the heterocycles upon warming to give the bicyclic compound 13. A similar compound (12) was directly formed when the bisalkyne 4 was treated with dineopentylaluminum
芳基-二(治疗叔-butylethynyl)膦芳基P(C≡C-
CME 3)2 [芳基= C 6 H ^ 5(4)2,4,6--ME 3 c ^ 6 ħ 2(5)]与氢化二烷基铝,R 2的Al-H(R =
CME 3,CH 2
CME 3),得到的杂环,两性离子化合物6 - 9由铝氢化和相应的二聚的释放叔-butylethynyl-二烷基衍
生物,[R 2的Al-C≡ C-
CME 3 ] 2(10和11)。的分子结构6 - 8揭示了在P 2 ç 2的Al环与四配铝原子,两个环外C = C双键,一个tricoordinated
磷原子,和
鏻阳离子携带芳基和炔基。升温后,将7的C≡C三键插入杂环的Al-P键中,得到
双环化合物13。当将二炔4用氢化二戊基戊铝处理时,直接形成类似的化合物(12)。它们的分子结构显示出环状的四(AlC 2P)和五元杂环(P 2 C 3)包含三个不同的C═C双键。在空间上最受屏蔽的单环化合物(8;芳基=