A Family of Cross-Conjugated Polyenynes Capped by Co<sup>III</sup>(cyclam): Syntheses, Molecular and Electronic Structures
作者:Sean N. Natoli、Matthias Zeller、Tong Ren
DOI:10.1021/acs.organomet.9b00313
日期:2019.7.22
Transition-metal complexes bridged by acyclic cross-conjugated frameworks are uncommon and can possess structurally unique nonlinear topologies and intriguing electron transport properties. Herein, we report the attachment of extended enyne scaffolds, L1 (3,6-diethynyl-2,7-dimethylocta-2,6-dien-4-yne) and L2 (5-ethynyl-6-methylhepta-5-en-1,3-diyne), to a CoIII(cyclam) unit. Mononuclear complexes Co-L1
由无环交叉共轭骨架桥连的过渡金属配合物并不常见,可以具有结构上独特的非线性拓扑结构和引人入胜的电子传输性能。在这里,我们报告扩展的烯炔支架,L1(3,6-dithynyl-2,7-dimethylocta-2,6-dien-4-yne)和L2(5-ethynyl-6-methylhepta-5-en- 1,3-二炔),转化为Co III(cyclam)单元。在甲醇弱碱条件下以中等至高收率合成了单核配合物Co-L1([Co(cyclam)(L1)Cl] PF 6)和Co-L2([Co(cyclam)(L2)Cl] PF 6) 。同样,双金属化合物Co-L1-Co([Co(cyclam)Cl} 2(μ-L1)](PF 6)2)和Co-L2-Co([Co(cyclam)Cl} 2(μ-L2)](PF 6)2)是由[Co(cyclam)Cl 2 ] Cl与Co-分别为L1或Co-L2。或者,在过量的[Co(cyclam)Cl