The radical cation generated from bicyclobutylidene in the CFC13 solution y-irradiated at 77 K exhibits a 26.2 G nonet (1 G = 10-4 T) of 2.7 G quintets in its e.s.r. spectrum; this experimental result and INDO and MIND0/3-UHF calculations predict a planar structure for the bicyclobutylidene radical cation.
:In the current complex social environment, the number of patients with dental psychosomatic disorders who visit dental university hospitals is increasing, and not only physicians but also dentists are struggling to deal with such cases.There are many women, including many cases with xerostomia, and the number has been increasing year by year in clinical statistics.
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