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The Versatility of Solid‐State Metathesis Reactions: From Rare Earth Fluorides to Carbodiimides
Author(s) -
Unverfehrt Leonid,
Glaser Jochen,
Ströbele Markus,
Tragl Sonja,
Gibson Katharina,
Meyer H.Jürgen
Publication year - 2009
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.200801324
Subject(s) - carbodiimide , metathesis , crystal structure , crystallography , salt metathesis reaction , chemistry , solid state , rare earth , inorganic chemistry , materials science , mineralogy , polymer chemistry , organic chemistry , polymerization , polymer
The new carbodiimide compounds LaF(CN 2 ) and LiPr 2 F 3 (CN 2 ) 2 were obtained as crystalline powders by solid‐state metathesis reactions from 1:1 molar ratios of RE F 3 ( RE = rare earth) and Li 2 (CN 2 ) at temperatures between 500 and 700 °C over 4 days in fused copper ampoules. Higher proportions of Li 2 (CN 2 ) in reactions yielded RE 2 (CN 2 ) 3 compounds, including the new Eu 2 (CN 2 ) 3 . Single‐crystal structure refinements were performed for LaF(CN 2 ) and LiPr 2 F 3 (CN 2 ) 2 . Homologous Li RE 2 F 3 (CN 2 ) 2 compounds with RE = Ce, Pr, Nd, Sm, Eu, Gd were assigned by isotypic indexing of their XRD patterns. The crystal structure of LaF(CN 2 ) contains planar [La 3 F 3 ] layers being interconnected by carbodiimide ions, and is related with that of the mineral bastnäsite ( RE F(CO 3 )).