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Preparation and Crystal Structure of a New Uranyl Sulfate Templated by a Bis‐isothiouronium Cation
Author(s) -
Charkin Dmitri O.,
Bezzubov Stanislav I.,
Siidra Oleg I.,
Borisov Artem S.,
Kalmykov Stepan N.
Publication year - 2020
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.202000168
Subject(s) - uranyl , thiourea , chemistry , orthorhombic crystal system , sulfuric acid , crystallography , aqueous solution , inorganic chemistry , crystal structure , sulfate , hydrogen bond , uranyl nitrate , molecule , ion , materials science , uranium , organic chemistry , metallurgy
Crystals of a new uranyl sulfate (C 2 N 4 H 8 S 2 )[UO 2 (SO 4 ) 2 ] · 0.3H 2 O ( 1 ) templated by a relatively rare bis‐isothiouronium cation, were formed upon evaporation of aqueous solutions containing uranyl acetate, thiourea, and excess sulfuric acid. The new compound is orthorhombic, P 2 1 2 1 2 1 , a = 6.928(2) Å, b = 13.398(3) Å, c = 15.225(3) Å, Z = 2. Its crystal structure is comprised of [UO 2 (SO 4 ) 2 ] moieties linked by hydrogen bonds formed between the template cations and terminal oxygen atoms of the sulfate tetrahedra. The C 2 N 4 H 8 S 2 2+ template is most likely formed in situ during a redox reaction between uranyl cation and thiourea in a strongly acidic medium, with UO 2 2+ partially reduced to U 4+ .