title: Two-coordinate first row transition metal complexes with short unsupported metal-metal bonds.
abstract: A series of first row transition metal complexes with unsupported M-Fe bonds, (3,5-(i)Pr2-Ar*)MFe(η(5)-C5H5)(CO)2 (M = Fe (1), Mn (2), Cr (3), 3,5-(i)Pr2-Ar* = -C6H-2,6-(C6H2-2,4,6-(i)Pr3)2-3,5-(i)Pr2), was synthesized by salt metathesis. They were characterized by (1)H NMR, UV-vis spectroscopy, X-ray crystallography, and SQUID magnetic measurements. Two distinct Fe atoms in 1 were confirmed by Mössbauer spectroscopy. All three compounds feature short metal-metal bond distances (Fe-Fe, 2.3931(8) Å (1); Mn-Fe, 2.4512(5) Å (2); Cr-Fe, 2.4887(5) Å (3)). Their DFT computed structures were in excellent agreement with the experimental data and revealed a dative bonding interaction between the metals.
authors.affiliation: Department of Chemistry, University of California, Davis, One Shields Avenue, Davis, California 95616, USA.
authors.forename: Hao
authors.initials: H
authors.lastname: Lei
authors.forename: Jing-Dong
authors.initials: JD
authors.lastname: Guo
authors.forename: James C
authors.initials: JC
authors.lastname: Fettinger
authors.forename: Shigeru
authors.initials: S
authors.lastname: Nagase
authors.forename: Philip P
authors.initials: PP
authors.lastname: Power