The crystal structure of the Re(CO)3(H2O) 3+ cation has been determined from crystals obtained by evaporation of an aqueous solution of [Re(CO)3(H2O) 3]Br. The bromide ion is incorporated in the Re2(CO) 9(μ3-Br)3- anion. A second structure was obtained by removal of bromide as AgBr and precipitation of the Re(CO)3(H2O)3+ cation with PF 6-. In the latter structure the conjugate base, Re(CO)3(OH)(H2O)2 is cocrystallized in the structure. Each structure along with the previously known cubane [Re(CO) 3(μ3-OH)]4·4H2O was obtained multiple times during crystallization studies. The use of other anions to generate crystalline products was unsuccessful.
- Aqua ligands
- Carbonyl ligands