A B C
Z. Naturforsch. 2014, 69b, 651 – 654
doi:10.5560/ZNB.2014-4035
Synthesis and Crystal Structure of a “High-temperature” Phase of Li[H2NC(O)NH], the Missing Alkali-Metal Ureate
Hannah Sawinski and Richard Dronskowski
Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1, 52056 Aachen, Germany
Reprint requests to Prof. Dr. R. Dronskowski. Fax: +49-241-80-92642. E-mail: drons@HAL9000.ac.rwth-aachen.de
Received February 19, 2014 / published online June 7, 2014
The new salt-like lithium ureate, LiCN2H3O, 1, was synthesized to round up the series of the recently published alkali-metal ureates. Single crystals of 1 were prepared similarly to the previously made ureates of Na–Cs in liquid ammonia. LiCN2H3O crystallizes in the monoclinic space group P21/n with a = 7.5770(9), b = 9.059(1), c =13.046(2) Å, β =98.896(2)°, V = 884.8(2) Å3, and Z = 12. The Li+ ions are coordinated by four ureate anions in a distorted tetrahedral manner. As expected, the deprotonation of the urea molecules is reflected by the shape of the anions with two different C–N bond lengths.
Key words: Ureates, Lithium, X-Ray Diffraction, Alkali Metals, Liquid Ammonia
Full-text PDF