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The hybrid dibismuthines O{(CH2)2BiPh2}2, MeN(CH2-2-C6H4BiR2)2, and S(CH2-2-C6H4BiR2)2 (R = Me, Ph), have been prepared and characterized by microanalysis, 1H and 13C{1H} NMR spectroscopy, and FAB mass spectrometry. The X-ray structures of O{(CH2)2BiPh2}2 and S(CH2-2-C6H4BiPh2)2 show close to symmetrical hypervalent interactions between the O or S atoms and both bismuth centers. The antimony analogue S(CH2-2-C6H4SbMe2)2 is quaternized by MeI to [S(CH2-2-C6H4SbMe3)2]I2, which also shows a hypervalent S···Sb interaction, but in this case to only a single antimony center. Complexes of these and related ligands with the CpFe(CO)2+ group, of the type [{CpFe(CO)2}2L][BF4]2 (L = O{(CH2)2BiPh2}2, MeN(CH2-2-C6H4BiR2)2, S(CH2-2-C6H4BiR2)2, O{(CH2)2SbR2}2, S(CH2-2-C6H4SbMe2)2, MeN(CH2-2-C6H4SbMe2)2, Ph2Sb(CH2)3SbPh2), have been prepared and characterized by microanalysis (antimony complexes only), 1H and 13C{1H} NMR and IR spectroscopy, and ES+ mass spectrometry. The X-ray crystal structure of [{CpFe(CO)2}2{O{(CH2)2...

Hybrid Dibismuthines and Distibines: Preparation and Properties of Antimony and Bismuth Oxygen, Sulfur, and Nitrogen Donor Ligands