The varied structures of cobalt(II)-pyridine (py)-sulfate: [Co(SO4)(py)4] n , [Co2(SO4)2(py)6] n , and [Co3(SO4)3(py)11] n

Ava M Park; Duyen N K Pham; James A Golen; David R Manke

doi:10.1107/S205698901901538X

The varied structures of cobalt(II)-pyridine (py)-sulfate: [Co(SO₄)(py)₄] _n , [Co₂(SO₄)₂(py)₆] _n , and [Co₃(SO₄)₃(py)₁₁] _n

Acta Crystallogr E Crystallogr Commun. 2019 Nov 19;75(Pt 12):1888-1891. doi: 10.1107/S205698901901538X. eCollection 2019 Dec 1.

Authors

Ava M Park¹, Duyen N K Pham², James A Golen², David R Manke²

Affiliations

¹ Portsmouth Abbey School, 285 Cory's Lane, Portsmouth, RI, 02871, USA.
² University of Massachusetts Dartmouth, 285 Old Westport Rd., North Dartmouth, MA, 02747, USA.

Abstract

The solid-state structures of two cobalt-pyridine-sulfate compounds, namely catena-poly[[tetra-kis-(pyridine-κN)cobalt(II)]-μ-sulfato-κ² O:O'], [Co(SO₄)(C₅H₅N)₄] _n , (1), and catena-poly[[tetra-kis-(pyridine-κN)cobalt(II)]-μ-sulfato-κ³ O:O',O''-[bis-(pyridine-κN)cobalt(II)]-μ-sulfato-κ³ O,O':O''] _n , [Co₂(SO₄)₂(C₅H₅N)₆] _n , (2), are reported. Compound (1) displays a polymeric structure, with infinite chains of Co^II cations adopting octa-hedral N₄O₂ coordination environments that involve four pyridine ligands and two bridging sulfate ions. Compound (2) is also polymeric with infinite chains of Co^II cations. The first Co center has an octa-hedral N₄O₂ coordination environment that involves four pyridine ligands and two bridging sulfate ligands. The second Co center has an octa-hedral N₂O₄ coordination environment that involves two pyridine ligands and two bridging sulfate ions that chelate the Co atom. The structure of (2) was refined as a two-component inversion twin.

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

Grants and funding

This work was funded by National Science Foundation, Directorate for Mathematical and Physical Sciences grant CHE-1429086.