The crystal structures of tetrakis(μ-<i>n</i>-butyrato-κ<sup>2</sup><i>O</i>:<i>O</i>′)bis[bromidorhenium(III)] and tetrakis(μ-<i>n</i>-butyrato-κ<sup>2</sup><i>O</i>:<i>O</i>′)bis[chloridorhenium(III)] acetonitrile disolvate
Acta crystallographica. Section E, Crystallographic communications