TY - JOUR A1 - Jansen, Helen A1 - Slootweg, J. Chris A1 - Lammertsma, Koop T1 - Valence isomerization of cyclohepta-1,3,5-triene and its heteroelement analogues JF - Beilstein Journal of Organic Chemistry PY - 2011/// VL - 7 SP - 1713 EP - 1721 SN - 1860-5397 DO - 10.3762/bjoc.7.201 PB - Beilstein-Institut JA - Beilstein J. Org. Chem. UR - https://doi.org/10.3762/bjoc.7.201 KW - aromaticity KW - cycloheptatriene KW - heteroatom KW - valence isomerization N2 - The valence isomerization of the all-carbon and heteroelement analogues of cyclohepta-1,3,5-triene into the corresponding bicyclo[4.1.0]hepta-2,4-dienes is reviewed to show the impact of the heteroatom on the stability of both valence isomers. The focus is on the parent systems and their synthetic applications. ER -