Assertion: benzene's structure | /r/HasProperty | unstable
Facets:
value: vibrationally
type: MANNER
Source sentences:
text: However, this work has been subject to much criticism by quantum chemists as it was concluded that the predicted I h symmetric structure was vibrationally unstable and the resulting cage undergoes a spontaneous symmetry break, yielding a puckered cage with rare T h symmetry (symmetry of a volleyball).