Reinvestigation of 'single-crystal X-ray structure of 1,3-dimethylcyclobutadiene'

摘要

An alternative explanation: The recent manuscript by Barboiu et al. claims trapping of photochemically generated 1,3-dimethylcyclobutadiene within a hemicarcerand host and determination of its crystal structure. Herein an alternative structural model is offered that demonstrates one does not need to invoke unconventional and highly unstable species to satisfactorily explain the observed electron density in the host cavity.