Mononuclear [(p-cym)RuCl(pz4lut)]Cl (1) and dinuclear [(p-cym)RuCl}2(μ-pz4lut)]Cl2 (2) complexes (p-cym = 1-isopropyl-4-methylbenzene) comprising of bis(pyrazol-1-yl)methane based heteroscorpionate ligand α,α,αâ²,αâ²-tetra(pyrazol-1-yl)-2,6-lutidine (pz4lut) have been synthesised from pz4lut ligand and dimeric precursor complex [(p-cym)RuCl(μ-Cl)]2 in methanol. The aqua derivatives [(p-cym)Ru(H2O)(pz4lut)](ClO4)2 (3) and [(p-cym)Ru(H2O)}2(μ-pz4lut)](ClO4)4 (4) are obtained from 1 and 2, respectively, via Cl/H2O exchange process in presence of appropriate equivalents of AgClO4 in methanolâwater mixture. The molecular structures of dinuclear complexes, 2 and 4 are authenticated by their single crystal X-ray structures. Cyclic voltammetry reveals negligible electronic communication between the metal centres in the ligand bridged complex 2. All four complexes have been tested for their anticancer activities in human breast (MCF7), lung (A549) and colon (HCT116) cancer cell lines. The complexes show dose dependent suppression of cell viability with moderately good IC50 values ranging from 3.5â92 μM. Experimental results have revealed that the aqua derivatives, 3 and 4 exhibit better cytotoxic effect against all those cell lines as compared to the precursor chlorido complexes, 1 and 2. Results also demonstrate that the complexes are more potent against HCT116 cells as compared to other cell lines.
单核[(p-cym)RuCl(pz4lut)]Cl (1)和双核[(p-cym)RuCl}2(δ-pz4lut)]Cl2 (2)配合物(p-cym = 1-异丙基-4-甲基苯)由双(
吡唑-1-基)
甲烷杂蝎酸
配体δ组成、(pz4lut)
配体和二聚前体[(p-cym)RuCl(δ-Cl)]2 在
甲醇中合成。在
甲醇和
水的混合物中,在适当当量的 Ag 存在下,通过 Cl/
H2O 交换过程,分别从 1 和 2 得到
水相衍
生物 [(p-cym)Ru( )(pz4lut)](
ClO4)2 (3) 和 [(p-cym)Ru( )}2(δ-pz4lut)]( )4 (4)。双核络合物 2 和 4 的分子结构由其单晶 X 射线结构验证。循环伏安法显示,
配体桥接复合物 2 中
金属中心之间的电子通讯微乎其微。所有四种复合物都在人类乳腺癌(MCF7)、肺癌(A549)和结肠癌(HCT116)
细胞系中进行了抗癌活性测试。这些复合物对细胞活力的抑制作用呈剂量依赖性,IC50 值在 3.5â92 ¼M 之间,中等偏上。实验结果表明,与前体酰
氯复合物 1 和 2 相比,
水相衍
生物 3 和 4 对所有这些细胞株都有更好的细胞毒性作用。实验结果还表明,与其他细胞株相比,这些复合物对 HCT116 细胞的作用更强。