Stabilization Of The CN₃⁵− Anion In Recoverable High-pressure Ln₃O₂(CN₃) (Ln=La, Eu, Gd, Tb, Ho, Yb) Oxoguanidinates

Titelangaben

Aslandukov, Andrii ; Jurzick, Pascal L. ; Bykov, Maxim ; Aslandukova, Alena ; Chanyshev, Artem ; Laniel, Dominique ; Yin, Yuqing ; Akbar, Fariia Iasmin ; Khandarkhaeva, Saiana ; Fedotenko, Timofey ; Glazyrin, Konstantin ; Chariton, Stella ; Prakapenka, Vitali ; Wilhelm, Fabrice ; Rogalev, Andrei ; Comboni, Davide ; Hanfland, Michael ; Dubrovinskaia, Natalia ; Dubrovinsky, Leonid:
Stabilization Of The CN₃⁵− Anion In Recoverable High-pressure Ln₃O₂(CN₃) (Ln=La, Eu, Gd, Tb, Ho, Yb) Oxoguanidinates.
In: Angewandte Chemie International Edition. Bd. 62 (2023) Heft 47 . - e202311516.
ISSN 1521-3773
DOI: https://doi.org/10.1002/anie.202311516

Volltext

Link zum Volltext (externe URL):

Abstract

Abstract A series of isostructural Ln3O2(CN3) (Ln=La, Eu, Gd, Tb, Ho, Yb) oxoguanidinates was synthesized under high-pressure (25?54?GPa) high-temperature (2000?3000?K) conditions in laser-heated diamond anvil cells. The crystal structure of this novel class of compounds was determined via synchrotron single-crystal X-ray diffraction (SCXRD) as well as corroborated by X-ray absorption near edge structure (XANES) measurements and density functional theory (DFT) calculations. The Ln3O2(CN3) solids are composed of the hitherto unknown CN35? guanidinate anion?deprotonated guanidine. Changes in unit cell volumes and compressibility of Ln3O2(CN3) (Ln=La, Eu, Gd, Tb, Ho, Yb) compounds are found to be dictated by the lanthanide contraction phenomenon. Decompression experiments show that Ln3O2(CN3) compounds are recoverable to ambient conditions. The stabilization of the CN35? guanidinate anion at ambient conditions provides new opportunities in inorganic and organic synthetic chemistry.