1997年5月30日 · A feature of this work is the formation of enyl, dienyl, alkynyl, yne and ring-con- traction derivatives indicating the cleavage of C-C bonds, as well as both saturated and unsaturated C-H bond activation [5,6].

2014年6月21日 · The homotropenylium cation (1, C8H9(+)) is a key species in the discussion of homoaromaticity. Constrained optimisations around the minimum structure have been performed, varying the size of the gap spanned by the CH2-bridge and …

2005年12月30日 · Gas-Phase Formation of 1,3,5,7-Cyclooctatetraene (C8H8) through Ring Expansion via the Aromatic 1,3,5-Cyclooctatrien-7-yl Radical (C8H9•) Transient. Journal of the American Chemical Society 2022, 144 (49) , 22470-22478. https://doi.org/10.1021/jacs.2c06448

Gas-Phase Formation of 1,3,5,7-Cyclooctatetraene (C8H8) through Ring Expansion via the Aromatic 1,3,5-Cyclooctatrien-7-yl Radical (C8H9•) Transient. Gas-phase 1,3,5,7-cyclooctatetraene (C8H8) and triplet aromatic 1,3,5,7-cyclooctatetraene (C8H8) were formed for the first time through bimolecular methylidyne radical (CH)-1,3,5-cycloheptatriene…

2014年5月7日 · In contrast to the equilibrium structure of the homoaromatic Cs homotropenylium cation, C8H9+, (1), which supports a pinched diatropic ring current, the C2v transition state (2) for inversion...

1978年7月18日 · Evidence is given for an unusual dihapto mode of bonding of the C8H3 ring in the latter complex. Reaction of the complex with NaBH4 yields (~5-C5H3)2Nb(fl3-C3H9). The mechanisms of the reactions are discussed.

2015年2月6日 · In contrast to the equilibrium structure of the homoaromatic C(s) homotropenylium cation, C8H9(+) (1), which supports a pinched diatropic ring current, the C(2v) transition state (2) for inversion of the methylene bridge of 1 is antiaromatic and supports a two-lobe paratropic π current, as detected …

Ring Expansion via the Aromatic 1,3,5-Cyclooctatrien-7-yl Radical (C8H9 ) Transient Zhenghai Yanga , Galiya R. Galimovab , Chao Hea, Srinivas Doddipatlaa, Alexander M. Mebelb*, Ralf I. Kaisera* a Department of Chemistry, University of Hawai’i at …

2022年12月1日 · Gas-phase 1,3,5,7-cyclooctatetraene (C8H8) and triplet aromatic 1,3,5,7-cyclooctatetraene (C8H8) were formed for the first time through bimolecular methylidyne radical (CH)-1,3,5-cycloheptatriene...

ring expansion to an aromatic 1,3,5-cyclooctatrien-7-yl radical (C 8 H 9 •). The chemically activated doublet radical intermediate undergoes unimolecular decomposition to 1,3,5,7-cyclooctatetraene. Substituted 1,3,5,7-cyclooctatetraene molecules can be prepared in the gas phase with hydrogen atom(s) in the 1,3,5-cycloheptatriene reactant being