shows an Fe-C bond length of 1.9413(12) Å, which is indistinguishable from the analogous distance in the monoprotonated iron(II) complex 2. The average Fe-S length is 2.23(2) Å in 4, which is slightly shorter than in 2. Again, all three Fe-P bond distances are different, with the phosphine trans to C having the shortest bond of 2.2692(6) Å while the cis phosphines have lengths of 2.3007(6) Å and 2.3050(5) Å. The average Fe-P bond in 4 is shorter than in 2 (2.23(1) Å vs.