Bis(2,4,6-triisopropylphenyl)tin(IV) compounds: Synthesis, single-crystal X-ray characterization and reactivity toward ionizing species and polar monomers
been studied by NMR spectroscopy. Compounds 2 and 4 underwent alkyl abstraction by [(CH3CH2)3Si]+[B(C6F5)4]− affording stablecationic species (2a, 4a). For the cationic specie 4a a π-interaction of the benzyl group to the metal centre was recognized by solution NMR studies. A cationic species (3a) was generated from compound 3 using AgSbF6 as ionizing agent. The cationic species (2a, 3a) exhibited moderate
通式Tip 2 SnRR'(Tip = 2,4,6-三异丙基苯; R = R'= CH 3(1); R = R'= CHCH 2(2); R = CH 2的新有机锡化合物的合成在此描述了Ph,R'= Br(3); R = R'= CH 2 CHCH 2(4))。该化合物的特征在于1 H,13 C,119 Sn NMR,质谱和元素分析。表征单晶X射线衍射分析已经获得的化合物2,3和4。通过NMR光谱已经研究了与电离剂的反应性。化合物2和4通过[(CH 3 CH 2)3 Si] + [B(C 6 F 5)4 ] -进行烷基提取,得到稳定的阳离子物种(2a,4a)。对于阳离子物质4a,通过溶液NMR研究识别出苄基与金属中心的π-相互作用。使用AgSbF 6作为电离剂,由化合物3生成阳离子物种(3a)。阳离子种类(图2a,3a)在1,4-丁二烯的阳离子聚合中表现出作为引发剂的适度活性,并且在环氧丙