Crystal structure and magnetic study of the complex salt [RuCp(PTA)2-μ-CN-1κ C:2κ N-RuCp(PTA)2][Re(NO)Br4(EtOH)0.5(MeOH)0.5]

Mario Pacheco; Natalia Alvarez; Alicia Cuevas; Antonio Romerosa; Francesc Lloret; Carlos Kremer

doi:10.1107/S2056989021006381

Crystal structure and magnetic study of the complex salt [RuCp(PTA)₂-μ-CN-1κ C:2κ N-RuCp(PTA)₂][Re(NO)Br₄(EtOH)_0.5(MeOH)_0.5]

Acta Crystallogr E Crystallogr Commun. 2021 Jun 30;77(Pt 7):749-754. doi: 10.1107/S2056989021006381. eCollection 2021 Jul 1.

Authors

Mario Pacheco¹, Natalia Alvarez¹, Alicia Cuevas¹, Antonio Romerosa², Francesc Lloret³, Carlos Kremer¹

Affiliations

¹ Area Quimica Inorganica, Facultad de Quimica, Universidad de la República, 11800, Montevideo, Uruguay.
² Area de Quimica Inorganica-CIESOL, Universidad de Almeria, 04120 Almeria, Spain.
³ Instituto de Ciencia Molecular, Universidad de Valencia, C/ Catedratico Jose, Beltran 2, 46980 Paterna, Valencia, Spain.

Abstract

A new Ru^II-Re^II complex salt, μ-cyanido-κ² C:N-bis-[(η⁵-cyclo-penta-dien-yl)bis(3,5,7-tri-aza-phosphaadamantane-κP)ruthenium(II)] tetra-bromido-(ethanol/methanol-κO)nitrosylrhenate(II), [Ru(CN)(C₅H₅)₂(C₆H₁₂N₃P)₄][ReBr₄(NO)(CH₄O)_0.5(C₂H₆O)_0.5] or [RuCp(PTA)₂-μ-CN-1κC:2κ² N-RuCp(PTA)₂][Re(NO)Br₄(EtOH)_0.5(MeOH)_0.5] (PTA = 3,5,7-tri-aza-phosphaadaman-tane) was obtained and characterized by single-crystal X-ray diffraction, elemental analysis and infrared spectroscopy. The title salt was obtained by liquid-liquid diffusion of methanol/DMSO solutions of (NBu₄)[Re(NO)Br₄(EtOH)] and [(PTA)₂CpRu-μ-CN-1κC:2κ² N-RuCp(PTA)₂](CF₃SO₃). The Ru^II and Re^II independent moieties correspond to a binuclear and mononuclear complex ion, respectively. A deep geometrical parameter analysis was performed, and no significant differences were found with earlier reports containing similar mol-ecules. The magnetic properties were investigated in the temperature range 2.0-300 K, and the complex behaves as a quasi-magnetically isolated spin doublet with weak anti-ferromagnetic inter-actions.

Keywords: PTA; X-ray structure; crystal structure; magnetism; rhenium(II); ruthenium(II).

Grants and funding

This work was funded by Programa de Desarrollo de las Ciencias Básicas (PEDECIBA); Comisión Sectorial de Investigación Científica grant Apoyo a Grupos de Investigación No. 2003 to Mario Pacheco, Alicia Cuevas, and Carlos Kremer; Comisión Académica de Posgrado (CAP); University of Almeria grants PPUENTE2020/011 and PAI team FQM-317 to Antonio Romerosa and Antonio Romerosa; Agencia Nacional de Investigación e Innovación; Spanish MINECO grants PID2019-109735GB-I00 and Unidad de Excelencia María de Maeztu CEX2019-000919-M; Generalitat Valenciana grant AICO/2020/183.