Asymmetry of the first directly observed intramolecular [C–H–C]– hydrogen bond in the carbanion of [1.1]ferrocenophane demonstrated by dynamic n.m.r. spectroscopy
Abstract
The temperature dependence of the 1H n.m.r. spectrum of the carbanion of [1.1]ferrocenophane in tetrahydrofuran shows that a double-well potential rather than a single-well one governs the motion of the proton in the C–H–C bond.