The crystal structures of iron and cobalt pyridine (py)-sulfates, [Fe(SO4)(py)4] n and [Co3(SO4)3(py)11] n

Duyen N K Pham; Mrittika Roy; Ava Kreider-Mueller; James A Golen; David R Manke

doi:10.1107/S2056989018007557

The crystal structures of iron and cobalt pyridine (py)-sulfates, [Fe(SO₄)(py)₄] _n and [Co₃(SO₄)₃(py)₁₁] _n

Acta Crystallogr E Crystallogr Commun. 2018 May 31;74(Pt 6):857-861. doi: 10.1107/S2056989018007557. eCollection 2018 Jun 1.

Authors

Duyen N K Pham¹, Mrittika Roy¹, Ava Kreider-Mueller¹, James A Golen¹, David R Manke¹

Affiliation

¹ Department of Chemistry and Biochemistry, University of Massachusetts Dartmouth, 285 Old Westport Road, North Dartmouth, MA 02747, USA.

Abstract

The solid-state structures of two metal-pyridine-sulfate compounds, namely catena-poly[[tetra-kis-(pyridine-κN)iron(II)]-μ-sulfato-κ²O:O'], [Fe(SO₄)(C₅H₅N)₄] _n , (1), and catena-poly[[tetra-kis-(pyridine-κN)cobalt(II)]-μ-sulfato-κ²O:O'-[tetra-kis-(pyridine-κN)cobalt(II)]-μ-sulfato-κ³O,O':O''-[tris-(pyridine-κN)cobalt(II)]-μ-sulfato-κ²O:O'], [Co₃(SO₄)₃(C₅H₅N)₁₁] _n , (2), are reported. The iron compound (1) displays a polymeric structure, with infinite chains of Fe^II atoms adopting octa-hedral N₄O₂ coordination environments that involve four pyridine ligands and two bridging sulfate ligands. The cobalt compound (2) displays a polymeric structure, with infinite chains of Co^II atoms. Two of the three Co centers have an octa-hedral N₄O₂ coordination environment that involves four pyridine ligands and two bridging sulfate ligands. The third Co center has an octa-hedral N₃O₃ coordination environment that involves three pyridine ligands, and two bridging sulfate ligands with one sulfate chelating the cobalt atom.

Keywords: coordination chemistry; crystal field theory; crystal structure; pyridine; sulfate; transition metals.

Grants and funding

This work was funded by National Science Foundation grant CHE-1429086.