found that the studied compounds existed exclusively in the cis-[PdCl2(CNR)(PPh3)] form in the solutions. In the case of cis-[PdCl2(CNCy)(PPh3)] in CH2Cl2, the conformational transitions of the equilibrium forms (the transition of the substituent in the cyclohexyl cycle between the equatorial and axial positions) are slowed down, the equatorial conformer prevailing in the solution (2: 1 at–95°С). Quantum-chemical
顺式-[PdCl 2(CNR)(PPh 3)] [R = Cy,t -Bu,C(Me)2 CH 2 C(Me)3 ]是通过[(PPh 3)ClPd(μ -Cl)2 PdCl(PPh 3)]和异
氰化物在室温下于CH 2 Cl 2中以90-98%的产率收率,并通过质谱法以及1 H,13 C 1 H,31 P}和31 P 11 H NMR光谱。借助X射线衍射分析已经阐明了固相中的配合物结构。通过1 H和31 P NMR光谱研究了CDCl 3和CD 2 Cl 2的配合物在–95至60°С温度下的动力学过程。已经发现所研究的化合物在溶液中仅以顺式-[PdCl 2(CNR)(PPh 3)]形式存在。在CH 2 Cl 2中为顺式-[PdCl 2(CNCy)(PPh 3)]的情况,平衡形式的构象转变(赤道和轴向位置之间的环己基环中取代基的转变)变慢,在溶液中占主导地位的是赤道构象异构体(在95°С