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Pilgrim: A thermal rate constant calculator and a chemical kinetics simulator

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TLDR
Pilgrim is a program written in Python and designed to use direct dynamics in the calculation of thermal rate constants of chemical reactions by the variational transition state theory (VTST), based on electronic structure calculations for the potential energy surface.
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This article is published in Computer Physics Communications.The article was published on 2020-11-01 and is currently open access. It has received 23 citations till now. The article focuses on the topics: Elementary reaction & Potential energy surface.

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A matrix completion algorithm for efficient calculation of quantum and variational effects in chemical reactions.

TL;DR: The harmonic variety-based matrix completion (HVMC) algorithm as mentioned in this paper exploits the low-rank character of the polynomial expansion of potential energy to recover vibrational frequencies (square roots of eigenvalues of nuclear Hessians) constituting the reaction path using a small sample of its entities.
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Chemical reactivity from the vibrational ground-state level. The role of the tunneling path in the tautomerization of urea and derivatives

TL;DR: The theoretical results indicate that the reaction mechanisms are controlled by tunneling, and the microcanonically optimized tunneling path that selects the tunneling probability as the maximum between the SCT and LAT tunneling probabilities is recommended.
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Identification of Torsional Modes in Complex Molecules Using Redundant Internal Coordinates: The Multistructural Method with Torsional Anharmonicity with a Coupled Torsional Potential and Delocalized Torsions.

TL;DR: In this paper , a multistructural and torsional anharmonicity (MS-T) method was proposed to automatically identify torsion vibrations and separate them from the other vibrational modes.
References
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Journal ArticleDOI

The ORCA program system

TL;DR: An overview of the current possibilities of ORCA is provided and its efficiency is documents.
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A General Method for Numerically Simulating the Stochastic Time Evolution of Coupled Chemical Reactions

TL;DR: In this paper, an exact method is presented for numerically calculating, within the framework of the stochastic formulation of chemical kinetics, the time evolution of any spatially homogeneous mixture of molecular species which interreact through a specified set of coupled chemical reaction channels.
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The Activated Complex in Chemical Reactions

TL;DR: In this paper, the probability of the activated state is calculated using ordinary statistical mechanics, and the probability multiplied by the rate of decomposition gives the specific rate of reaction, and necessary conditions for general statistical treatment to reduce to the usual kinetic treatment are given.
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Self‐Consistent Molecular‐Orbital Methods. I. Use of Gaussian Expansions of Slater‐Type Atomic Orbitals

TL;DR: In this article, a least square representation of Slater-type atomic orbitals as a sum of Gaussian-type orbitals is presented, where common Gaussian exponents are shared between Slater−type 2s and 2p functions.
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An Evaluation of Harmonic Vibrational Frequency Scale Factors

TL;DR: A near-linear relationship between the magnitude of the scale factor and the proportion of exact exchange is revealed and hybrid DFT calculations using a modified B3-LYP functional are probed.
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