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A Main‐Group Element Radical Based One‐Dimensional Magnetic Chain
Author(s) -
Feng Rui,
Zhang Li,
Ruan Huapeng,
Zhao Yue,
Tan Gengwen,
Wang Xinping
Publication year - 2019
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201901177
Subject(s) - chemistry , antiferromagnetism , borane , main group element , boron , diamagnetism , crystallography , potassium , group (periodic table) , density functional theory , pyridine , molecule , benzene , inorganic chemistry , medicinal chemistry , computational chemistry , transition metal , magnetic field , organic chemistry , physics , quantum mechanics , condensed matter physics , catalysis
The first main‐group element radical based one‐dimensional magnetic chain ( 1K ) n was realized by one‐electron reduction of the pyridinyl functionalized borane 1 with elemental potassium in THF in the absence of 18‐crown‐6 (18‐c‐6). The electron spin density of ( 1K ) n mainly resides at the boron centers with a considerable contribution from central benzene and pyridine moieties. The spin centers exhibit an antiferromagnetic interaction as demonstrated by magnetic measurements and theoretical calculations. In contrast, the reduction in the presence of 18‐c‐6 afforded the separated radical anion salt 1K(Crown) , in which the potassium cation was trapped by THF and 18‐c‐6 molecules. Further one‐electron reduction of 1K(Crown) and ( 1K ) n led to the diamagnetic monomer and polymer, respectively.