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Synthese, Kristallstrukturen und thermische Eigenschaften von Bariumsalzen der 4‐Sulfobenzoesäure
Author(s) -
Wagner Christoph,
Merzweiler Kurt
Publication year - 2008
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.200800013
Subject(s) - triclinic crystal system , barium , chemistry , monoclinic crystal system , carboxylate , sulfonate , crystal structure , crystallography , molecule , barium hydroxide , coordination polymer , inorganic chemistry , stereochemistry , organic chemistry , sodium
Abstract Synthesis, Crystal Structures and Thermal Properties of Barium Salts of 4‐Sulfobenzoic Acid The reaction of 4‐sulfobenzoic acid with barium hydroxide in the molar ratio 2 : 1 leads to the formation of Ba(O 3 SC 6 H 4 COOH) 2 ( 1 ). 1· 3H 2 O crystallizes triclinic, space group $\rm P{\bar 1}$ , with a = 719.6(7), b = 1136.9(6), c = 1249.7(10) pm, α = 102.81(5), β = 91.73(7), γ = 106.95(6)° (at 293 K). The barium cations exhibit a ninefold coordination by six oxygen atoms from sulfonate and carboxyl groups and three water molecules. The linkage of the barium cations by bridging 4‐carboxybenzenesulfonate anions leads to a 3D coordination polymer. Ba(O 3 SC 6 H 4 COO) ( 2 ) is obtained from 4‐sulfobenzoic acid and barium hydroxide in equimolar amounts. 2· 2H 2 O crystallizes monoclinic, space group C2/c with a = 2105.5(5), b = 704.1(1), c = 1455.4(3) pm, β = 90.49(3)° (at 220 K). The barium cations are coordinated by seven oxygen atoms from sulfonate and carboxylate groups and two water molecules. The 4‐sulfobenzoate anions act as bridging ligands to form a 3D coordination polymer.