analyses. The molecular structures of 2 and 3 showed a low degree of strain indicated by the dihedral (α = 4.8° for 2; 4.9/3.7° for 3) and distortion (δ = 176.2° for 2; 174.3/176.3° for 3) angles between the two rings. The structure of 4 was severely disordered. Compounds 2–4 are thermally resistant to ring-opening polymerization, as revealed by differential scanning calorimetry studies, with 2 exhibiting
盐消除反应dilithiotroticene之间[(η 7 -C 7 ħ 6 Li)的
钛(η 5 -C 5 H ^ 4栗)]∙
PMDTA(1)(
PMDTA = Ñ,Ñ ',Ñ ',Ñ “,Ñ ” -五甲基二亚)和
硅氧烷二
氯化物的ClMe 2 SI-(OSiMe 2)米-Cl(米 = 1-3)在低温下所允许的合成和分离的
硅氧烷桥连[ ñ ] troticenophanes [(η 7 -C 7 ħ 6)的Ti(η 5–C 5 H 4)](OSiMe 2)m(SiMe 2)(2,m = 1; 3,m = 2; 4,m = 3)为中度收率的蓝色结晶固体。通过1 H,13 C和29 Si NMR光谱,元素和单晶X射线衍射分析对化合物进行表征。的分子结构2和3显示出低程度的应变的指示由二面角(α = 4.8°,2 ; 4.9 / 3.7°,3)和失真(δ = 176.2°,2; 两个环之间的3)角为174