(C2H5)3Al⋅TiCl3\left(\mathrm{C}_{2} \mathrm{H}_{5}\right)_{3} \mathrm{Al} \cdot \mathrm{TiCl}_{3}(C2H5)3Al⋅TiCl3
(Ph)3Al.SnCl4(\mathrm{Ph})_{3} \mathrm{Al}{.\mathrm{SnCl}_{4}}(Ph)3Al.SnCl4
(CH3)3 B. SiCl4\left(\mathrm{CH}_{3}\right)_{3} \text { B. } \mathrm{SiCl}_{4}(CH3)3 B. SiCl4
(C4H9)3P⋅ZnCl2\left(\mathrm{C}_{4} \mathrm{H}_{9}\right)_{3} \mathrm{P} \cdot \mathrm{ZnCl}_{2}(C4H9)3P⋅ZnCl2