In:
Acta Crystallographica Section C Structural Chemistry, International Union of Crystallography (IUCr), Vol. 74, No. 2 ( 2018-02-01), p. 131-138
Abstract:
Ten isostructural single-crystal diffraction studies of mixed cation Ca/Sr salt forms of the salicylate anion are presented, namely catena -poly[[diaquacalcium(II)/strontium(II)]-bis(μ 2 -2-hydroxybenzoato)], [Ca 1– x Sr x (C 7 H 5 O 3 ) 2 (H 2 O) 2 ] n , where x = 0, 0.041, 0.083, 0.165, 0.306, 0.529, 0.632, 0.789, 0.835 and 1. The structure of an isostructural Sr/Ba species, namely catena -poly[[diaquastrontium(II)/barium(II)]-bis(μ 2 -2-hydroxybenzoato)], [Sr 0.729 Ba 0.271 (C 7 H 5 O 3 ) 2 (H 2 O) 2 ], is also described. The Ca/Sr structures form a series where, with increasing Sr content, the unit cell expands in both the crystallographic a and c directions (by 1.80 and 3.18%, respectively), but contracts slightly in the b direction (−0.31%). The largest percentage structural expansion lies parallel to the direction of propagation of the one-dimensional coordination polymer that is the primary structural feature. This structural expansion is thus associated with increased M —O distances. Aqueous solubility measurements show that solubility generally increases with increasing Sr content. Thus, tuning the composition of these mixed counter-ion salt forms leads to systematic structural changes and allows solubility to be tuned to values between those for the pure Ca and Sr species.
Type of Medium:
Online Resource
ISSN:
2053-2296
DOI:
10.1107/S2053229617018265
DOI:
10.1107/S2053229617018265/eg3233sup1.cif
DOI:
10.1107/S2053229617018265/eg3233CaSalsup2.hkl
DOI:
10.1107/S2053229617018265/eg3233CaSr9010sup3.hkl
DOI:
10.1107/S2053229617018265/eg3233CaSr8020sup4.hkl
DOI:
10.1107/S2053229617018265/eg3233CaSr7030sup5.hkl
DOI:
10.1107/S2053229617018265/eg3233CaSr6040sup6.hkl
DOI:
10.1107/S2053229617018265/eg3233CaSr5050sup7.hkl
DOI:
10.1107/S2053229617018265/eg3233CaSr3070sup8.hkl
DOI:
10.1107/S2053229617018265/eg3233CaSr2080sup9.hkl
DOI:
10.1107/S2053229617018265/eg3233CaSr1090sup10.hkl
DOI:
10.1107/S2053229617018265/eg3233Sr100sup11.hkl
DOI:
10.1107/S2053229617018265/eg3233SrBasup12.hkl
Language:
Unknown
Publisher:
International Union of Crystallography (IUCr)
Publication Date:
2018
detail.hit.zdb_id:
2025703-X
Permalink