Department of Analytical Chemistry and Computer Chemistry, Faculty of Chemistry, University of Plovdiv, “Tzar Asen” Str. 24, 4000 Plovdiv, Bulgaria
Marin Marinov
Department of Chemistry and Phytopharmacy, Faculty of Plant Protection and Agroecology, Agricultural University-Plovdiv, 4000 Plovdiv, Bulgaria
Plamen Penchev
Department of Analytical Chemistry and Computer Chemistry, Faculty of Chemistry, University of Plovdiv, “Tzar Asen” Str. 24, 4000 Plovdiv, Bulgaria
Petya Marinova
Department of General and Inorganic Chemistry with Methodology of Chemistry Education, Faculty of Chemistry, University of Plovdiv, “Tzar Assen” Str. 24, 4000 Plovdiv, Bulgaria
Neyko Stoyanov
Department of Chemical, Food and Biotechnologies, “Angel Kanchev” University of Ruse, Razgrad Branch, 7200 Razgrad, Bulgaria
The structure verification of 5′-oxospiro-(fluorene-9,4′-imidazolidine)-2′-thione by NMR is reported. Toward this aim, 2D NMR techniques including 1H-1H COSY, HMQC, and HMBC experiments were used to assist with the assignment of the 1H and 13C chemical shifts for the corresponding structure. The mutual interpretation of the 1D and 2D NMR spectra ensured a complete and accurate 1H and 13C NMR data assignment for 5′-oxospiro-(fluorene-9,4′-imidazolidine)-2′-thione.