Collision-induced dissociation of iron ion (Fe2+)

Abstract

In this paper, we present collision-induced-dissociation (CID) studies of gas-phase Fe2+. Experiments were performed on a new guided ion beam mass spectrometer designed to produce cold, mass-selected ions. The energy dependence of the cross section for CID with Xe is presented. Interpretation of the cross-section threshold is consistent with theoretical models and gives D°(Fe2+) = 2.72 ± 0.07 eV. Combined with the known ionization potentials and electron affinities of Fe and Fe2, this bond energy also provides D°(Fe2) = 1.15 ± 0.09 eV and Z)°(Fe2-) = 1.90 ± 0.09 eV. These dimers are discussed with regard to previous work and their respective bonding schemes.

Ammonia activation by iron: state-specific reactions of Fe+(6D, 4F) with ND3 and the reaction of FeNH+ with D2

“…The flow conditions used in this ion source provide in excess of 10 4 collisions between an ion and the buffer gas, which is assumed to thermalize the ions rotationally and vibrationally. During our analysis of the data for reactions of FeNH + , we assume that the ions produced in this source are in their electronic ground state and that the internal energy of the FeNH + species is well described by a Maxwell-Boltzmann distribution of ro-vibrational states at 300 K. Previous work from this laboratory has shown that these assumptions are generally valid [30][31][32][33][34][35].…”

Effect of Substituents on the Strength of A−Cl-(A = Si, Ge, and Sn) Bonds in Hypervalent Systems: ACl5-, ACl4F-, and A(CH3)3Cl2-

“…This effect is eliminated by linear extrapolation of the data taken at several pressures to a zero pressure cross section before fitting the data. 33 The reagents Si(CH 3 ) 3 Cl, Ge(CH 3 ) 3 Cl, Sn(CH 3 ) 3 Cl, SiCl 4 , GeCl 4 , and SnCl 4 were obtained from Acros. He, Ar, and SF 6 were obtained from BOC, and Xe was obtained from Spectra Gases.…”

Electronic ground states of Fe2+ and Co2+ as determined by x-ray absorption and x-ray magnetic circular dichroism spectroscopy

“…In contrast to Fe + 2 for which the only experimental data that is available is the bond dissociation energy 27,56 , an attempt has been made to assign the electronic ground state of Co + 2 from matrix-isolation electron spin resonance spectroscopy at 2 K in a neon matrix.…”