HC[(CMe)(NAr)] 2 , Ar ) 2,6-iPr 2 C 6 H 3 ) reacted with iron and manganese complexes to giVe LGe(OH)Fe(CO) 4 (2) and LGe(OH)Mn(Cp)(CO) 2 (3; Cp ) cyclopentadienyl). Compounds 2 and 3 were characterized by IR, multinuclear NMR, EI-MS, and single-crystal X-ray diffraction.

Full and unambiguous assignment of all 1H- and 13C-NMR resonances of the isomers due to restricted C-N amide bond rotation of N-formyl-o-toluidine and N,N’-bis-formyl-o-tolidine in DMSO-d6 is reported. The cis-isomer predominates in the equilibrium mixture of both compounds as 1D-NOE difference experiments show.

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