Sp2- and sp3–C⋯O tetrel bonds in the 3-oxetanone homodimer
Literature Information
Hao Wang, Yang Zheng, Xinyue Zhang, Xuefang Xu
The structures and non-covalent interactions at play in the 3-oxetanone homodimer have been investigated using a pulsed jet Fourier transform microwave spectrometer supplemented with quantum chemical calculations. Two isomers were identified in the pulsed jet. With the analyses of non-covalent intermolecular interactions including the quantum theory of atoms, Johnson's non-covalent interactions and natural bond orbital, the observed global minimum is stabilized by a combination of one sp2–C⋯O tetrel bond and a network of multiple C–H⋯O weak hydrogen bonds. The second isomer is characterized by carbonyl–carbonyl interactions, with the formation of one sp2- and one sp3–C⋯O tetrel bond. The conformational population of the two observed isomers in the supersonic expansion was estimated to be NCE1/NCC1 ≈ 7/5.
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