10.1021/om400936b.s001 Masamichi Ogasawara Masamichi Ogasawara Wei-Yi Wu Wei-Yi Wu Sachie Arae Sachie Arae Kiyohiko Nakajima Kiyohiko Nakajima Tamotsu Takahashi Tamotsu Takahashi Inter- versus Intraannular Ring-Closing Metathesis of Polyallylferrocenes: Five-Fold RCM within a Single Molecule American Chemical Society 2013 superferrocenophane metathesi intraannular RCM process Intraannular species polyallylferrocene decaallylferrocene bridged Single MoleculeTreatment bi formation catalyst Inter refluxing dichloromethane Metathesi interannular quintuply Polyallylferrocene 2013-11-11 00:00:00 Journal contribution https://acs.figshare.com/articles/journal_contribution/Inter_versus_Intraannular_Ring_Closing_Metathesis_of_Polyallylferrocenes_Five_Fold_RCM_within_a_Single_Molecule/2355889 Treatment of decaallylferrocene (<b>1</b>) with the Grubbs-II catalyst in refluxing dichloromethane has promoted the 5-fold ring-closing metathesis in <b>1</b> to afford single-bridged bis­(1,4,5,8-tetrahydrofluorenyl)­iron­(II) species <b>3</b> in excellent yield. The preferential formation of <b>3</b> over quintuply bridged “superferrocenophane” <b>2</b> was explained as the intraannular RCM process being preferred over the interannular one in the reactions of polyallylferrocenes.