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Synthesis and Crystal Structures of Alkali and Alkaline Earth Metal Complexes of 3,5‐Dinitropyrazolyl‐4‐carboxylate
Author(s) -
Guo Lili,
Lv XingPu,
Chen JingHuo,
Zhang Wenhua,
Yang Guang
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.201900301
Subject(s) - crystal structure , carboxylate , deprotonation , ligand (biochemistry) , alkali metal , chemistry , crystallography , alkaline earth metal , metal , potassium , stereochemistry , ion , organic chemistry , biochemistry , receptor
The synthesis and crystal structures of 3,5‐dinitro‐1 H ‐pyrazolyl‐4‐carboxylic acid (H 2 dnpzc) and its four complexes with Ca 2+ , Ba 2+ , Na + and K + are reported in this paper. Ca(dnpzc) · 5H 2 O exhibits a 1D polymeric structure, whereas Ba(dnpzc) · 4H 2 O possesses a 2D structure. The structure of Na 2 (dnpzc) · 4H 2 O consists of 2D layers of [Na(dnpzc)] – n and 1D chains of [Na(H 2 O) 3 ] + n . K 2 (dnpzc) · H 2 O has a true 3D structure. It was observed that the doubly deprotonated ligand (dnpzc 2– ) can act as a versatile bridge to form polymeric structures by varying combinations of its 8 potential donor atoms (two carboxy O atoms, two pyrazolyl N atoms and four nitro O atoms). Particularly in the structure of K 2 (dnpzc) · H 2 O, all the 8 donor atoms of dnpzc 2– take part in the coordination and as many as 10 potassium atoms are connected by one ligand.