title: A novel octa-nuclear 32-membered zirconocene macrocycle based on the aromatic selenite.
abstract: A novel macrocyclic zirconocene(iv) aromatic selenite [(CpZr)8L16]·2(Cp4Zr2(μ-O)Cl2) (complex 1) (Cp = cyclopentadienyl anion; L = 4-fluorobenzeneseleninic acid) was prepared by the reaction of bis(cyclopentadienyl)zirconium dichloride with 4-fluorobenzeneseleninic acid and characterized by elemental analysis, infrared spectroscopy,1H,13C NMR spectroscopy, ESI-MS, XRD and X-ray diffraction. The structure analysis shows that complex 1 is a centrosymmetric 32-membered macrocycle containing an eight-nuclear zirconocene. In this complex, the 4-fluorobenzeneseleninic acid ligands adopt bidentate mode in coordinating to zirconium, which play a bridging role in the formation of a macrocycle. The title compound is a rare example of aromatic selenic acid-based zirconocene derivatives. Furthermore, the preliminary in vitro anti-tumor activity of complex 1 has also been studied toward breast cancer cell lines (MDA-MB-231) and human cervix cell lines (HeLa). The results indicate that complex 1 shows higher activity compared with the ligand and bis(cyclopentadienyl)zirconium dichloride.
authors.affiliation: School of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng, 252059, China. zhangrf856@163.com organotin@163.com.
authors.forename: Nian-Tao
authors.initials: NT
authors.lastname: Yao
authors.affiliation: School of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng, 252059, China. zhangrf856@163.com organotin@163.com.
authors.forename: Ru-Fen
authors.initials: RF
authors.lastname: Zhang
authors.affiliation: School of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng, 252059, China. zhangrf856@163.com organotin@163.com.
authors.forename: Shao-Liang
authors.initials: SL
authors.lastname: Zhang
authors.affiliation: School of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng, 252059, China. zhangrf856@163.com organotin@163.com.
authors.forename: Qian-Li
authors.initials: QL
authors.lastname: Li
authors.affiliation: School of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng, 252059, China. zhangrf856@163.com organotin@163.com.
authors.forename: Chun-Lin
authors.initials: CL
authors.lastname: Ma