Details

Autor(en) / Beteiligte

• Zhao, Ming-Gang
• Li, Li
• He, Ru-Ru
• Zhang, Xiang
• Ma, Jian-Ping
• Su, Ji-Hu
• Zheng, Wenjun

Titel

1,2,4-Triazolato paddlewheel dibismuth complexes with very short Bi( ii )–Bi( ii ) bonds: bismuth( iii ) oxidation of 1,2,4-triazolato anions into neutral N -1,2,4-triazolyl radicals

Ist Teil von

• Dalton transactions : an international journal of inorganic chemistry, 2020-11, Vol.49 (43), p.15190-15194

Ort / Verlag

Cambridge: Royal Society of Chemistry

Erscheinungsjahr

2020

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Bismuth( iii ) oxidation of 3,5-di-substituted-1,2,4-triazolato anions afforded a paddlewheel 1,2,4-triazolato dibismuth complex [L 2 (Bi–Bi)L 2 ] (L = η 1 ,η 1 -3,5-R 2 tz, R = Ph (3), i Pr (4)) with very short Bi( ii )–Bi( ii ) bonds (2.8650(4)−2.8721(3) Å). The reaction involved the intermediates of the organobismuth radical [Bi(R 2 tz) 2 ]˙ and neutral N -1,2,4-triazolyl radical [3,5-R 2 tz]˙. The dimerization of the former produced the corresponding dibismuth complex while the latter was trapped by using spin trap 5,5-dimethyl-1-pyrroline- N -oxide (DMPO) to give the radical adduct of {(3,5-R 2 tz)(DMPO)}˙ which was unambiguously evidenced by EPR analysis.