A new tetra­kis-substituted pyrazine carb­oxy­lic acid, 3,3′,3′′,3′′′-{[pyrazine-2,3,5,6-tetra­yltetra­kis(methyl­ene)]tetra­kis­(sulfanedi­yl)}tetra­propionic acid: crystal structures of two triclinic polymorphs and of two potassium–organic frameworks

Pacifico, J.; Stoeckli-Evans, H.

doi:10.1107/S2056989021003479

Acta Crystallographica Section E
Acta Crystallographica
Section E CRYSTALLOGRAPHIC COMMUNICATIONS

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Figure 5
A comparison of the orientation of the –CH₂—S—CH₂—CH₂– side chains in (a) polymorph H₄L1_A, (b) for the major disordered component of polymorph H₄L1_B, (c) KH₃L1 and (d) K₂H₂L1 [see Table 1

for further details; symmetry codes: (i) = (ii) −x + 2, −y + 1, −z + 1; (iii) −x + $[{1\over 2}]$ , −y + $[{1\over 2}]$ , −z; (iv) −x + $[{1\over 2}]$ , −y + $[{5\over 2}]$ , −z + 1].

CRYSTALLOGRAPHIC
COMMUNICATIONS

ISSN: 2056-9890

Volume 77| Part 5| May 2021| Pages 480-490

https://doi.org/10.1107/S2056989021003479

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