Hijji Yousef M, Hudrlik Paul F, Hudrlik Anne M, Butcher Ray J, Jasinski Jerry P
Acta Crystallogr Sect E Struct Rep Online. 2008 Dec 17;65(Pt 1):o135. doi: 10.1107/S160053680804227X.
The title compound, C(33)H(34)O(4)Si, is a dioxasilepine compound, an effective chiral dopant for the determination of high helical twisting powers in liquid crystals. Its structure consists of a five-membered dioxolo ring fused to a seven-membered dioxasilepine ring which contains two sets of phenyl rings in a twisted butterfly shape attached to the two Csp(3) atoms in the ring opposite each other. Two methyl groups are attached to the Si atom in the ring and two additional methyl groups are attached to the Csp(3) atom in the dioxolo ring (one of which is disordered) and which lies in an envelope pattern. The dihedral angles between the mean planes of the phenyl ring pairs are 85.9 (2) and 83.5 (1)°. The dihedral angles between the mean planes of the dioxolo ring and the two pairs of butterfly shaped phenyl rings are 46.2 (1), 67.7 (1), 35.6 (7) and 83.5 (1)°.
标题化合物C(33)H(34)O(4)Si是一种二氧杂硅环戊烷化合物，是一种用于测定液晶中高螺旋扭曲能力的有效手性掺杂剂。其结构由一个与七元二氧杂硅环戊烷环稠合的五元二氧杂环组成，该七元环包含两组呈扭曲蝴蝶形状的苯环，它们连接到环中彼此相对的两个Csp(3)原子上。两个甲基连接到环中的硅原子上，另外两个甲基连接到二氧杂环中的Csp(3)原子上（其中一个无序），且该Csp(3)原子呈信封式构象。苯环对平均平面之间的二面角为85.9 (2)°和83.5 (1)°。二氧杂环平均平面与两对蝴蝶形苯环平均平面之间的二面角分别为46.2 (1)°、67.7 (1)°、35.6 (7)°和83.5 (1)°。
