title: Crystal structure of tetra-kis-(μ-n-butyrato-κ(2) O:O')bis-[chlorido-rhenium(III)](Re-Re).
abstract: With an inversion center at the mid-point of the two Re(III) atoms, the title compound, [Re2Cl2{O2C(CH2)2CH3}4], exhibits a paddle-wheel or lantern-type structure with four n-butyrate groups bridging two Re(III) atoms in a syn-syn fashion. The axial chloride ligands together with the Re-Re quadruple bond [2.2330 (3) Å] complete an essentially octa-hedral geometry around each Re(III) 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 mol-ecules in the unit cell, and no significant inter-molecular inter-actions were noticed between mol-ecules in the crystal.
authors.affiliation: Department of Chemistry, St. Francis Xavier University, PO Box 5000, Antigonish, Nova Scotia, B2G 2W5, Canada.
authors.forename: Michael P
authors.initials: MP
authors.lastname: Thomson
authors.affiliation: Department of Chemistry, St. Francis Xavier University, PO Box 5000, Antigonish, Nova Scotia, B2G 2W5, Canada.
authors.forename: Natasha F
authors.initials: NF
authors.lastname: O'Rourke
authors.affiliation: Department of Chemistry, Queen's University, Kingston, Ontario, Canada, K7L 3N6.
authors.forename: Ruiyao
authors.initials: R
authors.lastname: Wang
authors.affiliation: Department of Chemistry, St. Francis Xavier University, PO Box 5000, Antigonish, Nova Scotia, B2G 2W5, Canada.
authors.forename: Manuel A S
authors.initials: MA
authors.lastname: Aquino
keywords: butyrate bridging ligand; crystal structure; dirhenium core