High-Pressure Synthesis of K 4 N 6 with All Nitrogen Atoms Forming Aromatic Hexazine [N 6 ] 4– Anions - Jie Zhang; Tingting Ye; Guo Chen; Deyuan Yao; Xin Zhang; Chuanguo Zhang; Jing Zhao; Pei Wang; Junfeng Ding; Zhi Zeng; Xianlong Wang (Journal of the American Chemical Society, 2026)