Comparison of linear-scaling semiempirical methods and combined quantum mechanical/molecular mechanical methods for enzymic reactions. II. An energy decomposition analysis

2002 ◽  
Vol 23 (14) ◽  
pp. 1314-1322 ◽  
Author(s):  
Stephen J. Titmuss ◽  
Peter L. Cummins ◽  
Alistair P. Rendell ◽  
Andrey A. Bliznyuk ◽  
Jill E. Gready
Keyword(s):  
Decomposition Analysis ◽  
Semiempirical Methods ◽  
Energy Decomposition Analysis ◽  
Quantum Mechanical ◽  
Linear Scaling ◽  
Energy Decomposition ◽  
Mechanical Methods

Comparison of linear-scaling semiempirical methods and combined quantum mechanical/molecular mechanical methods applied to enzyme reactions

2000 ◽  
Vol 320 (1-2) ◽  
pp. 169-176 ◽  
Author(s):  
Stephen J Titmuss ◽  
Peter L Cummins ◽  
Andrey A Bliznyuk ◽  
Alistair P Rendell ◽  
Jill E Gready
Keyword(s):  
Semiempirical Methods ◽  
Quantum Mechanical ◽  
Linear Scaling ◽  
Enzyme Reactions ◽  
Mechanical Methods

scholarly journals A comparative study of energetics of ferrocenium and ferrocene

2018 ◽  
Author(s):  
Shawkat Islam ◽  
Feng Wang
Keyword(s):  
Decomposition Analysis ◽  
Open Shell ◽  
Electrostatic Energy ◽  
Orbital Energy ◽  
Energy Decomposition Analysis ◽  
Quantum Mechanical ◽  
High Symmetry ◽  
Energy Decomposition ◽  
Molecular Electronic ◽  
Repulsive Energy

Ferrocenium (Fc+) inherits a number of molecular/electronic properties from the neutral counterparts’ ferrocene (Fc) including the high symmetry. Both Fc+ and Fc prefer the eclipsed structure (D5h) over the staggered structure (D5d) by an energy of 0.36 kcal·mol-1. The present study using the recently developed excess orbital energy spectrum (EOES) shows that the open shell Fc+ cation exhibits similar conformer dependent configurational changes to the neutral Fc conformer pair. A further energy decomposition analysis (EDA) discloses that the reasons for the preferred structures are different between Fc+ and Fc. The dominant differentiating energy between the Fc+ conformers is the electrostatic energy (EEstat), whereas in neutral Fc, it is the quantum mechanical Pauli repulsive energy (EPauli). Within the D5h conformer of Fc+, the EOES reveals that the -electrons of Fc+ experience more substantial conformer dependent energy changes than the -electrons (assumed the hole is in a β orbital).

scholarly journals Direct estimate of the internal π-donation to the carbene centre within N-heterocyclic carbenes and related molecules

2015 ◽  
Vol 11 ◽  
pp. 2727-2736 ◽  
Author(s):  
Diego M Andrada ◽  
Nicole Holzmann ◽  
Thomas Hamadi ◽  
Gernot Frenking
Keyword(s):  
Density Functional Theory ◽  
Density Functional ◽  
Decomposition Analysis ◽  
Heterocyclic Carbenes ◽  
Energy Decomposition Analysis ◽  
Energy Decomposition ◽  
Direct Estimate ◽  
Functional Theory ◽  
Bonding Analysis

Fifteen cyclic and acylic carbenes have been calculated with density functional theory at the BP86/def2-TZVPP level. The strength of the internal X→p(π) π-donation of heteroatoms and carbon which are bonded to the C(II) atom is estimated with the help of NBO calculations and with an energy decomposition analysis. The investigated molecules include N-heterocyclic carbenes (NHCs), the cyclic alkyl(amino)carbene (cAAC), mesoionic carbenes and ylide-stabilized carbenes. The bonding analysis suggests that the carbene centre in cAAC and in diamidocarbene have the weakest X→p(π) π-donation while mesoionic carbenes possess the strongest π-donation.

Characterization of cisplatin/membrane interactions by QM/MM energy decomposition analysis

2021 ◽  
Vol 23 (36) ◽  
pp. 20533-20540
Author(s):  
Gustavo Cárdenas ◽  
Álvaro Pérez-Barcia ◽  
Marcos Mandado ◽  
Juan J. Nogueira
Keyword(s):  
Decomposition Analysis ◽  
Energy Decomposition Analysis ◽  
Energy Decomposition ◽  
Membrane Interactions

The interactions that control the permeation of cisplatin through a DOPC bilayer are unveiled by a QM/MM EDA scheme.

XEDA , a fast and multipurpose energy decomposition analysis program

2021 ◽  
Author(s):  
Zhen Tang ◽  
Yanlin Song ◽  
Shu Zhang ◽  
Wei Wang ◽  
Yuan Xu ◽  
...  
Keyword(s):  
Decomposition Analysis ◽  
Energy Decomposition Analysis ◽  
Analysis Program ◽  
Energy Decomposition
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