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The structures of two facially coordinated Group VII metal complexes are reported, namely: fac -bromido-[2-(2,2'-bipyridin-6-yl)benzoic acid-κ 2  N , N ']tricarbonyl-manganese(I) tetra-hydro-furan monosolvate, [MnBr(C 17 H 12 N 2 O 2 )(CO) 3 ]·C 4 H 8 O, I , and fac -[2-(2,2'-bipyridin-6-yl)benzoic acid-κ 2  N , N ']tricarbonyl-chlorido-rhenium(I) tetra-hydro-furan monosolvate, [ReCl(C 17 H 12 N 2 O 2 )(CO) 3 ]·C 4 H 8 O, II . In both complexes, the metal ion is coordinated by three carbonyl ligands, a halide ion, and a 2-(2,2'-bipyridin-6-yl)benzoic acid ligand, in a distorted octa-hedral geometry. In manganese complex I , the tetra-hydro-furan (THF) solvent mol-ecule could not be refined due to disorder. The benzoic acid fragment is also disordered over two positions, such that the carb-oxy-lic acid group is either positioned near to the bromide ligand or to the axial carbonyl ligand. In the crystal of I , the complex mol-ecules are linked by a pair of C-H⋯Br hydrogen bonds, forming inversion dimers that stack up the a -axis direction. In the rhenium complex II , there is hydrogen bonding between the benzoic acid moiety and a disordered co-crystallized THF mol-ecule. In the crystal, the mol-ecules are linked by C-H⋯Cl hydrogen bonds, forming layers parallel to (100) separated by layers of THF solvent mol-ecules.

Crystal structures of a manganese(I) and a rhenium(I) complex of a bipyridine ligand with a non-coordinating benzoic acid moiety