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Triple bonds between iron and heavier group-14 elements in the AFe(CO) 3 - complexes (A = Ge, Sn, and Pb)

Triple bonds between iron and heavier group-14 elements in the AFe(CO) 3 - complexes (A = Ge, Sn, and Pb)

Chemical Communications 55(40): 5685-5688

Heteronuclear transition-metal-main-group element carbonyl anion complexes of AFe(CO)3- (A = Ge, Sn, and Pb) are prepared using a laser vaporization supersonic ion source in the gas phase, which were studied by mass-selected infrared (IR) photodissociation spectroscopy. The geometric and electronic structures of the experimentally observed species are identified by a comparison of the measured and calculated IR spectra. These anion complexes have a 2A1 doublet electronic ground state and feature an A[triple bond, length as m-dash]Fe triply bonded C3v structure with all of the carbonyl ligands bonded at the iron center. Bonding analyses of AFe(CO)3- (A = C, Si, Ge, Sn, Pb, and Fl) indicate that the complexes are triply bonded between the valence np atomic orbitals of bare group-14 atoms and the hybridized 3d and 4p atomic orbitals of iron.

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Accession: 066722569

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PMID: 31020278

DOI: 10.1039/c8cc09340g

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