1,1′‐Bis(diphenylphosphino)ferrocene Complexes of Platinum(II) and Platinum(I). Crystal and Molecular Structure of ((L‐L)Pt(μ‐H)(μ‐CO)Pt(L‐L)) (BF4)·0.5 H2O, Where L‐L: Fe(η5‐C5H4PPh2)2.