A heterometallic hexanuclear Fe₄Sm₂ cluster supported by pivalate and phenyldiethanolamine ligands
Vol 21 No 1 (2026), EXACT SCIENCES
Vol 21 No 1 (2026)

A heterometallic hexanuclear Fe₄Sm₂ cluster supported by pivalate and phenyldiethanolamine ligands

EXACT SCIENCES
https://doi.org/10.36120/2587-3644.v21i1.39-45
Published July 23, 2026
Daniel Podgornîi
Institute of Applied Physics, Moldova State University, Chisinau, Republic of Moldova
https://orcid.org/0000-0002-8040-7403
Sergiu Shova
``Petru Poni” Institute of Macromolecular Chemistry of the Romanian Academy, Iasi, Romania
https://orcid.org/0000-0002-1222-4373
Svetlana G. Baca
Institute of Applied Physics, Moldova State University, Chisinau, Republic of Moldova
https://orcid.org/0000-0002-2121-2091

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Keywords

3d metal
lanthanide
heterometallic clusters
amino-polyalcohol ligands
single-crystal X-ray diffraction
SHAPE analysis.

How to Cite

Podgornîi, D., Shova, S., & Baca, S. G. (2026). A heterometallic hexanuclear Fe₄Sm₂ cluster supported by pivalate and phenyldiethanolamine ligands. Acta Et Commentationes Exact and Natural Sciences, 21(1), 39-45. https://doi.org/10.36120/2587-3644.v21i1.39-45
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Abstract

A new hexanuclear heterometallic [Fe₄Sm₂(OH)₂ (piv)₄(phdea)₄(N₃)₂(H₂O)₂] Cl₂ ·3MeCN (1) cluster has been synthesized using a mu-oxo [Fe₃O(piv)₆(H₂O)₃](piv)·Hpiv (Hpiv = pivalic acid) precursor, SmCl₃ ·6H₂O, NaN₃, and N-phenyldiethanolamine (H₂phdea). Single-crystal X-ray diffraction analysis reveals that 1 possesses a nonplanar butterfly-type core with an open-dicubane topology. Continuous Shape Measure (CShM) and Bond Valence Sum (BVS) analyses confirm the distorted octahedral geometry for six-coordinate Fe(III) centers and square-antiprismatic geometries for eight-coordinate Sm(III) ions, consistent with trivalent oxidation states.

https://doi.org/10.36120/2587-3644.v21i1.39-45