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Synthesis, Characterization, and Crystal Structure of [ReO(Me4tu)4](PF6)3 (tu = thiourea)

Authors :
Martina Kieninger
Dinorah Gambino
Oscar N. Ventura
Enrique J. Baran
Alvaro W. Mombrú
Raúl Mariezcurrena
Leopoldo Suescun
Eduardo Kremer
Source :
Scopus-Elsevier
Publication Year :
1999
Publisher :
Wiley, 1999.

Abstract

A new ReV oxo complex with tetramethylthiourea, [ReO(Me4tu)4](PF6)3, has been synthesized by reduction of perrhenate with tin(II) chloride in strongly acidic solution in the presence of excess tetramethylthiourea. The complex has been characterized by elemental analysis and electronic and FTIR spectroscopy. The molecular structure of the compound was determined by X-ray diffraction methods. The coordination polyhedron is a regular square pyramid with the substituted thiourea sulfur atoms in the equatorial positions [d(Re–S) = 2.339(3) A] and the oxo ligand located in the summit [d(Re–O) = 1.63(2) A]. Computational methods were employed to analyze the geometric and electronic structures of tetramethylthiourea and thiourea. Quantum mechanical studies suggest steric hindrance as the reason for the stabilization of the ReO3+ center instead of the ReIII one.

Details

ISSN :
15213749 and 00442313
Volume :
625
Database :
OpenAIRE
Journal :
Zeitschrift für anorganische und allgemeine Chemie
Accession number :
edsair.doi.dedup.....38d0afd052fd8f803533be1ed923a5b4
Full Text :
https://doi.org/10.1002/(sici)1521-3749(199905)625:5<813::aid-zaac813>3.0.co;2-0