RESUMO
A new ferrocene complex, 16-ferrocenylmethyl-3ß-hy-droxy-estra-1,3,5(10)-trien-17-one dimethyl sulfoxide monosolvate, [Fe(C5H5)(C24H27O2)]·C2H6OS, has been synthesized and structurally characterized by single-crystal X-ray diffraction techniques. The mol-ecule crystallizes in the space group P21 with one mol-ecule of dimethyl sulfoxide. A hydrogen bond links the phenol group and the dimethyl sulfoxide O atom, with an Oâ¯O distance of 2.655â (5)â Å. The ferrocene group is positioned in the ß face of the estrone moiety, with an O-C-C-C torsion angle of 44.1â (5)°, and the carbonyl bond length of the hormone moiety is 1.216â (5)â Å, typical of a C=O double bond. The average Fe-C bond length of the substituted Cp ring [Fe-C(Cp*)] is similar to that of the unsubstituted one [Fe-C(Cp)], i.e. 2.048â (3) versus 2.040â (12)â Å. The structure of the complex is compared with those of estrone and eth-oxy-methyl-estrone.