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（四）1.A striking structural feature of this polymer is the alternating
assembly of the two distinct homo-chiral helices along the crystallographic b axis (Fig. 2). One helix is formed by hydroxo
bridging Zn(II) atoms. The Zn…Zn distance bridged by a hydroxo anion is about 3.573 Å, and the pitch of the helix is about 5.824 Å. The other type of helix is constructed by spcp bridged between the Zn(II) centers, displaying an opposite helical orientation to the former helix. The Zn…Zn distance bridged by spcp is about 11.527 Å, and the pitch of the helix is identical with the former. The dimension of the [Zn-spcp] helical tube is about 1.0 3 0.7 nm, which is close to those observed in others due to the large size of the spcp ligand. Furthermore, the formation of [Zn-spcp] helical tube is due to the sp3 configurations of C and S of the –CH2S– spacer, forcing
the spcp ligand to be nonlinear and generating the twisty helical
conformation.
沿晶体b轴（图2）两种截然不同的HOMO -手性螺旋的大会。羟基是由一个螺旋
弥合锌（II）原子。锌...锌由羟基负离子桥距离约3.573Å，螺旋间距约5.824Å。其他类型的螺旋构造由学校专业发展协作计划“之间的锌（II）中心桥，显示了相反的螺旋方向前螺旋。锌...锌由学校专业发展协作计划“桥距离约11.527Å，螺旋间距是与前者相同。 [锌，学校专业发展协作计划“]斜管的尺寸是约1.030.7纳米，这是密切观察其他由于学校专业发展协作计划”配体的大尺寸。此外，锌学校专业发展协作计划“]斜管的形成是由于SP3的C和S- CH2S的间隔配置，迫使学校专业发展协作计划“配体的非线性产生的曲折螺旋
