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Synthesis and Structural Investigation of a Complete Series of Brightly Colored Alkali Metal 1,3‐Dimethylviolurates
Author(s) -
Lorenz Volker,
Liebing Phil,
Hilfert Liane,
Schröder Lea,
Edelmann Frank T.
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.202000356
Subject(s) - alkali metal , chemistry , metal , crystallography , crystal structure , solid state , stereochemistry , organic chemistry
A complete series of alkali metal 1,3‐dimethylviolurates M(Me 2 Vio) was synthesized and fully characterized. The title compounds M(Me 2 Vio)(H 2 O) [M = Li ( 3 ), Na ( 4 )], K(Me 2 Vio)(H 2 O) 0.5 ( 5 ) and M(Me 2 Vio) [M = Rb ( 6 ), Cs ( 7 )] were prepared by neutralizing 1,3‐dimethylvioluric acid (= HMe 2 Vio; 2 ) with 1 equiv. of the corresponding metal hydroxides MOH. The resulting salts exhibit striking colors ranging from orange‐red ( 3 ) through purple ( 4 , 5 ) to bright blue ( 6 , 7 ). In contrast to the monohydrate 4 , the classical synthesis of sodium 1,3‐dimethylviolurate from 1,3‐dimethylbarbituric acid and NaNO 2 afforded the purple trihydrate Na(Me 2 Vio)(H 2 O) 3 ( 4a ). All new compounds have been fully characterized by their IR and NMR ( 1 H, 13 C) spectra as well as elemental analyses. X‐ray crystal structure determination revealed that the title compounds exist as one‐ (Li, Na), two‐ (K, Cs), or three‐dimensional (Rb) coordination polymers in the solid state.