Preparation and Structure of Protonated Selenourea

• Published in: European journal of inorganic chemistry Vol. 2018; no. 47; pp. 5053 - 5057
• Main Authors: Leitz, Dominik, Virmani, Alan, Morgenstern, Yvonne, Zischka, Florian, Kornath, Andreas J.
• Format: Journal Article
• Language: English
• Published: Weinheim Wiley Subscription Services, Inc 19-12-2018
• Subjects: Crystal structure; Electrostatic interactions; Fluorine; Inorganic chemistry; Organic chemistry; Protonation; Selenium; Selenourea; Structural analysis; Structure elucidation; Superacidic systems
• ISSN: 1434-1948; 1099-0682
• DOI: 10.1002/ejic.201800933

Selenourea was investigated in the binary superacidic media XF/MF5 (X = H, D; M = As, Sb). The protonation selectively takes place at the selenium atom leading to the corresponding salts [(X2N)2CSeX]+[MF6]–. The characterization of the colorless salts was performed by low temperature vibrational spectroscopy. In the case of [(H2N)2CSeH]+[SbF6]– a single‐crystal X‐ray structure analysis is reported. The observed Se···F interaction in the solid state is discussed in context of σ‐hole interactions. Selenourea undergoes structural changes due to the protonation which are discussed together with quantum‐chemical calculations.
Salts containing protonated selenourea were prepared and characterized for the first time. The synthesis succeeded in the binary superacidic systems XF/MF5 (X = H, D; M = As, Sb).