SEARCH Articles Figures Tables Chair Chair-like Chair-like transition state Chair-like transition structure Chair-like transition structures aldol reactions Claisen chair-like transition state Crotyl organometallic compounds chair-like transition states Six-membered chair-like transition state Stereoselectivity chair-like transition state Stereoselectivity chair-like transition structures Zimmerman-Traxler chair-like transition state Zimmerman-Traxler, chair-like transition