Crystal structure of tetrakis(μ-n-butyrato-κ2O:O′)bis[chloridorhenium(III)](Re—Re)

• Main Authors: Michael P. Thomson, Natasha F. O'Rourke, Ruiyao Wang, Manuel A. S. Aquino
• Format: Article
• Language: English
• Published: International Union of Crystallography 2014-10-01
• Series: Acta Crystallographica Section E
• Subjects: crystal structure; dirhenium core; butyrate bridging ligand
• Online Access: http://scripts.iucr.org/cgi-bin/paper?S1600536814020273
• ISSN: 1600-5368

With an inversion center at the mid-point of the two ReIII atoms, the title compound, [Re2Cl2{O2C(CH2)2CH3}4], exhibits a paddle-wheel or lantern-type structure with four n-butyrate groups bridging two ReIII atoms in a syn–syn fashion. The axial chloride ligands together with the Re—Re quadruple bond [2.2330 (3) Å] complete an essentially octahedral geometry around each ReIII atom. There is little distortion, with an Re—Re—Cl bond angle of 176.18 (3)° and typical cis-O—Re—O bond angles ranging from 89.39 (11) to 90.68 (11)°. There are two molecules in the unit cell, and no significant intermolecular interactions were noticed between molecules in the crystal.