scholarly journals Is There a Quadruple Fe-C Bond in FeC(CO)3?

Computation ◽  
2021 ◽  
Vol 9 (9) ◽  
pp. 95
Author(s):  
Tommaso Nottoli ◽  
Filippo Lipparini

A recent computational paper (Kalita et al., Phys. Chem. Chem. Phys. 2020, 22, 24178–24180) reports the existence of a quadruple bond between a carbon and an iron atom in the FeC(CO)3 molecule. In this communication, we perform several computations on the same system, using both density functional theory and post-Hartree–Fock methods and find that the results, and in particular the Fe-C bond length and stretching frequency depend strongly on the method used. We ascribe this behavior to a strong multireference character of the FeC(CO)3 ground state, which explains the non-conclusive results obtained with single-reference methods. We therefore conclude that, while the existence of a Fe-C quadruple bond is not disproved, further investigation is required before a conclusion can be drawn.

2015 ◽  
Vol 17 (18) ◽  
pp. 12367-12367
Author(s):  
Tong Zhu ◽  
Xiao He ◽  
John Z. H. Zhang

Correction for ‘Fragment density functional theory calculation of NMR chemical shifts for proteins with implicit solvation’ by Tong Zhu et al., Phys. Chem. Chem. Phys., 2012, 14, 7837–7845.


2000 ◽  
Vol 55 (9-10) ◽  
pp. 769-771 ◽  

Abstract Molecular orbital calculations were performed for the six saturated alkylamines (CH3NH2 , (CH3)2 NH, (CH 3)3 N, CH 3CH2NH2 , (CH3)2 CHNH2 , (CH3)3 CNH2), their protonated cations (CH3NH3 + , (CH3)2NH2 + , (CH3)3NH + , CH3CH2NH3 + , (CH3)2CHNH3 + , (CH3)3CNH3+), and (CH3)4 N + using the Hartree-Fock, second-order M0ller-Plesset, and density functional theory methods with the 6-311+G(d,p) basis set. Protonation lengthens the C-N bonds of the amines by 0.05 -0.08 Å and shortens the C-C bonds of CH3CH2NH2, (CH3)2CHNH2 , and (CH3)3CNH2 by ca. 0.01 Å.


2014 ◽  
Vol 16 (18) ◽  
pp. 8697-8698 ◽  
Author(s):  
J. Even ◽  
L. Pedesseau ◽  
C. Katan

Yun Wang et al. used density functional theory (DFT) to investigate the orthorhombic phase of CH3NH3PbI3, which has recently shown outstanding properties for photovoltaic applications.


2008 ◽  
Vol 22 (14) ◽  
pp. 2225-2239
Author(s):  
TAMÁS GÁL

Following a recent work [Gál, Phys. Rev. A64, 062503 (2001)], a simple derivation of the density-functional correction of the Hartree–Fock equations, the Hartree–Fock–Kohn–Sham equations, is presented, completing an integrated view of quantum mechanical theories, in which the Kohn–Sham equations, the Hartree–Fock–Kohn–Sham equations and the ground-state Schrödinger equation formally stem from a common ground: density-functional theory, through its Euler equation for the ground-state density. Along similar lines, the Kohn–Sham formulation of the Hartree–Fock approach is also considered. Further, it is pointed out that the exchange energy of density-functional theory built from the Kohn–Sham orbitals can be given by degree-two homogeneous N-particle density functionals (N = 1, 2, …), forming a sequence of degree-two homogeneous exchange-energy density functionals, the first element of which is minus the classical Coulomb-repulsion energy functional.


Author(s):  
Junjie Yang ◽  
Zheng Pei ◽  
Jingheng Deng ◽  
Yuezhi Mao ◽  
Qin Wu ◽  
...  

Correction for ‘Analysis and visualization of energy densities. I. Insights from real-time time-dependent density functional theory simulations’ by Junjie Yang et al., Phys. Chem. Chem. Phys., 2020, 22, 26838–26851, DOI: 10.1039/d0cp04206d.


2017 ◽  
Vol 19 (27) ◽  
pp. 18100-18101
Author(s):  
Rebecca A. Coates ◽  
Georgia C. Boles ◽  
Christopher P. McNary ◽  
Giel Berden ◽  
Jos Oomens ◽  
...  

Correction for ‘Zn2+ and Cd2+ cationized serine complexes: infrared multiple photon dissociation spectroscopy and density functional theory investigations’ by Rebecca A. Coates et al., Phys. Chem. Chem. Phys., 2016, 18, 22434–22445.


2017 ◽  
Vol 19 (31) ◽  
pp. 21185-21190
Author(s):  
Alexander L. Samgin ◽  
Alexander N. Ezin

In a recent paper in this journal, proton transport in oxides was considered in terms of density functional theory and the non-adiabatic Flynn–Stoneham approach of small polaron type proposed much earlier for metals.


2020 ◽  
Vol 22 (25) ◽  
pp. 14376-14376
Author(s):  
Alexander S. Tygesen ◽  
Nicolai R. Mathiesen ◽  
Jin Hyun Chang ◽  
Juan María García-Lastra

Correction for ‘Density functional theory study of superoxide ions as impurities in alkali halides’ by Alexander S. Tygesen et al., Phys. Chem. Chem. Phys., 2020, DOI: 10.1039/d0cp00719f.


Author(s):  
Peter L. Rodríguez-Kessler ◽  
Adán R. Rodríguez-Domínguez ◽  
Desmond MacLeod-Carey ◽  
Alvaro Muñoz-Castro

The electronic and vibrational properties of the new most stable Ag15 cluster are investigated by density functional theory calculations (DFT) and compared with the results of the original work.


2018 ◽  
Vol 20 (6) ◽  
pp. 4606-4606 ◽  
Author(s):  
Loïc M. Roch ◽  
Kim K. Baldridge

Correction for ‘General optimization procedure towards the design of a new family of minimal parameter spin-component-scaled double-hybrid density functional theory’ by Loïc M. Roch and Kim K. Baldridge, Phys. Chem. Chem. Phys., 2017, 19, 26191–26200.


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