fac-Aqua[1,2-bis(diphenylphosphino)ethane-P,P']tricarbonylmanganese tetrafluoroborate (monoclinic form)

The title compound, whose aqua ligand is exceedingly labile, crystallizes in a monoclinic form without a solvent molecule of crystallization. A recently observed triclinic form of this complex crystallized as a monohydrate. The Mn-O distance [2.102(3)Å] is consistent with the bond distance reported for the triclinic form [2.075(2)Å] and the related complex [(depe)(CO)₃Mn(OH₂)]BF₄ [2.115(2)Å; depe is 1,2-bis(diethylphosphino)ethane].

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