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1,2,4-Triazolato paddlewheel dibismuth complexes with very short Bi(<scp>ii</scp>)–Bi(<scp>ii</scp>) bonds: bismuth(<scp>iii</scp>) oxidation of 1,2,4-triazolato anions into neutral N-1,2,4-triazolyl radicals
- Source :
- Dalton Transactions. 49:15190-15194
- Publication Year :
- 2020
- Publisher :
- Royal Society of Chemistry (RSC), 2020.
-
Abstract
- Bismuth(III) oxidation of 3,5-di-substituted-1,2,4-triazolato anions afforded a paddlewheel 1,2,4-triazolato dibismuth complex [L2(Bi–Bi)L2] (L = η1,η1-3,5-R2tz, R = Ph (3), iPr (4)) with very short Bi(II)–Bi(II) bonds (2.8650(4)−2.8721(3) A). The reaction involved the intermediates of the organobismuth radical [Bi(R2tz)2]˙ and neutral N-1,2,4-triazolyl radical [3,5-R2tz]˙. 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-R2tz)(DMPO)}˙ which was unambiguously evidenced by EPR analysis.
Details
- ISSN :
- 14779234 and 14779226
- Volume :
- 49
- Database :
- OpenAIRE
- Journal :
- Dalton Transactions
- Accession number :
- edsair.doi...........483bf836e0dc0286a98d040cdc0f8ae0