Nayak Mithilesh Kumar, Elvers Benedict J, Mehta Sakshi, Krummenacher Ivo, Mondal Abhishake, Braunschweig Holger, Schulzke Carola, Ravat Prince, Jana Anukul
Tata Institute of Fundamental Research Hyderabad, Gopanpally, Hyderabad-500107, India.
Institut für Biochemie, Universität Greifswald, Felix-Hausdorff-Straße 4, D-17489, Greifswald, Germany.
Chem Commun (Camb). 2024 Feb 8;60(13):1739-1742. doi: 10.1039/d3cc05779h.
Crystalline polymeric structures of -1,4-cyclohexylene bridged -tethered bis-CAACs in the form of their LiOTf adducts were synthesized and isolated. These were further used as building blocks for the synthesis of crystalline (amino)(carboxy)-based diradicals. The triplet diradical character of these compounds was unambiguously confirmed by the presence of a half-field signal in their EPR spectra. Theoretical calculations show that the singlet state is marginally more stable than the triplet state.
合成并分离出了以其三氟甲磺酸锂加合物形式存在的-1,4-亚环己基桥连- tethered双环戊二烯的结晶聚合物结构。这些进一步用作合成基于（氨基）（羧基）的结晶双自由基的构建块。这些化合物的三重态双自由基特征通过其电子顺磁共振光谱中半峰信号的存在得到明确证实。理论计算表明，单重态比三重态略微更稳定。
