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. 2024 May 3;29(9):2125.
doi: 10.3390/molecules29092125.

Coordination Polymer Based on a Triangular Carboxylate Core {Fe(μ3-O)(μ-O2CR)6} and an Aliphatic Diamine

Vladimir A Bushuev  1   2 , Natalia V Gogoleva  1 , Stanislav A Nikolaevskii  1 , Sergey V Novichihin  3 , Dmitriy S Yambulatov  1 , Mikhail A Kiskin  1 , Igor L Eremenko  1
Affiliations

Coordination Polymer Based on a Triangular Carboxylate Core {Fe(μ3-O)(μ-O2CR)6} and an Aliphatic Diamine

Vladimir A Bushuev et al. Molecules. .

Abstract

Interaction of the pre-organized complex of iron(II) trimethylacetate and 1,10-phenanthroline (phen) [Fe2(piv)4(phen)2] (1) (piv = (Me)3CCO2-)) with 1,6-diaminohexane (dahx) in anhydrous acetonitrile yielded a 1D coordination polymer [Fe3O(piv)6(dahx)1.5]n (2) and an organic salt of pivalic acid (H2dahx)(piv)2 (3). The structure of the obtained compounds was determined by single-crystal X-ray diffraction analysis. The phase purity of the complexes was determined by powder X-ray diffraction analysis. According to the single-crystal X-ray analysis, coordination polymer 2 is formed due to the binding of a triangular carboxylate core {Fe3(μ3-O)(μ-piv)6} with an aliphatic diamine ligand. Thermal behavior was investigated for compounds 1 and 2 in an argon atmosphere.

Keywords: aliphatic diamines; carboxylate complexes; coordination polymers; iron complexes; molecular structure.

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Conflict of interest statement

The authors declare no conflicts of interest. The funders had no role in the design of the study; in the collection, analyses, or interpretation of data; in the writing of the manuscript; or in the decision to publish the results.

Figures

Scheme 1
Scheme 1
The formation of complexes 1, 2 and an organic salt 3.
Figure 1
Figure 1
Molecular structure (a) and crystal packing (b) of 1 ((a)—thermal ellipsoids with a probability of 30%; (a,b)—hydrogen atoms are not shown, π–π contacts are indicated by dotted lines between the centroids of the aromatic rings N2C26–C30 and N3C33–C37).
Figure 1
Figure 1
Molecular structure (a) and crystal packing (b) of 1 ((a)—thermal ellipsoids with a probability of 30%; (a,b)—hydrogen atoms are not shown, π–π contacts are indicated by dotted lines between the centroids of the aromatic rings N2C26–C30 and N3C33–C37).
Figure 2
Figure 2
Fragments of 1D polymer structure 2: (a)—binding of triangular fragments {Fe3O(piv)6} by μ-bridging molecules of 1,6-diaminohexane, (b)—fragment of a chain formed by binding {Fe3O(piv)6} through Fe1 and Fe2 atoms along axes 0c, (c)—fragment of corrugated tape, (d)—projection of the tape packing on the 0ab plane (hydrogen atoms and CH3 groups are not shown).
Figure 3
Figure 3
Fragment of the crystal packing of compound 3 (thermal ellipsoids with a probability of 30%, hydrogen atoms at CH3 groups are not shown, N–H…O and C–H…O interactions are indicated by the dotted line).
Figure 4
Figure 4
Comparison of experimental (A, blue line) and theoretical (B, red line) diffraction patterns for sample 1.
Figure 5
Figure 5
Comparison of experimental (A, blue line) and theoretical (B, red line) diffraction patterns for sample 2.
Figure 6
Figure 6
TGA (blue) and DTA (red) curves for complex 1.
Figure 7
Figure 7
TGA (blue) and DTA (red) curves for complex 2.
See this image and copyright information in PMC

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