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QM-22

Datasets of molecules that are "certified" for diffusion Monte Carlo calculations of the zero-point state, except as noted. Here are the citations for each dataset. Details of how the datasets were generated are molecule-specific and are given in these papers.

Data File Format

Number of atoms
Energy (hartree)
Atom label and cartesian coords (angstrom) gradient components if included (hartree/bohr)”

n-tetradecane C₁₄H₃₀

B3LYP energies and gradients, not DMC certified

“DFT-Based Permutationally Invariant Polynomial Potentials Capture the Twists and Turns of C₁₄H₃₀”, Qu, et al. (in preparation)

NaCl-H₂ interaction

CCSD(T)/aug-cc-pVTZ energies. These are interaction energies (that is, E_int = E_dimer - E_NaCl - E_hydrogen

“Ab Initio Potential Energy Surface for NaCl−H₂ with Correct Long-Range Behavior”, Pandey, et al., J. Phys. Chem. A 128, 902 (2024)

Acetaldehyde (singlet)

CCSD(T) and MRCI energies

“Quasiclassical trajectory calculations of the dissociation dynamics of CH₃CHO at high energy yield many products”, Han, et al., J. Phys. Chem. Lett. 2, 1715 (2011). “Photodissociation of CH₃CHO at 248 nm: identification of the channels of roaming, triple fragmentation and the transition state”, Han, et al., Phys. Chem. Chem. Phys. 19, 18628 (2017).

Acetaldehyde (triplet)

CCSD(T) energies

“Intersystem crossing and dynamics in O(³P)+C₂H₄ multichannel reaction: Experiment validates theory”, Fu, et al., Proc. Nat. Acad. Sci. 109, 9733 (2012).

Ethanol

B3LYP energies and gradients

“Permutationally invariant polynomial regression for energies and gradients using backward differentiation achieves orders of magnitude speed-up while keeping high precision compared to other machine learning methods”, Houston et al. J. Chem. Phys. 156, 044120 (2022)

Glycine

B3LYP energies and gradients

“Full-dimensional, ab initio potential energy surface for glycine with characterization of stationary points and zero-point energy calculations by means of diffusion Monte Carlo and semiclassical dynamics“, Conte et al., J. Chem. Phys. 153, 244301 (2020)

Malonaldehyde

CCSD(T)/CBS energies

“Full-dimensional quantum calculations of ground-state tunneling splitting of malonaldehyde using an accurate ab initio potential energy surface”, Wang et al., J. Chem. Phys. 128, 224314 (2008)

Methane

B3LYP energies and gradients

“Using Gradients in Permutationally Invariant Polynomial Potential Fitting: A Demonstration for CH₄ Using as Few as 100 Configurations”, Nandi et al. J. Chem. Theory Comput. 2019, 15, 2826−2835

syn-CH₃CHOO

CCSD(T)/MRCI energies only

“Unimolecular dissociation dynamics of vibrationally activated CH₃CHOO Criegee intermediates to OH radical products”, Kidwell et al, Nat. Chem. 8, 509–514 (2016)

Tropolone

B3LYP energies and gradients

“Permutationally Invariant Polynomial Potential Energy Surfaces for Tropolone and H atom Tunneling Dynamics”,Houston et al, J. Chem. Phys. 153 024107 (2020).

N-methyl acetamide

B3LYP energies and gradients

“Full and fragmented permutationally invariant polynomial potential energy surfaces for transand cis N-methyl acetamide and isomerization saddle points”, Nandi et al, J. Chem. Phys. 151, 084306 (2019).

Hydronium H₃O⁺, OCHCO⁺, H₂CO/cis-trans HCOH, formic acid dimer

CCSD(T) or MRCI energies only

“Assessing Gaussian Process Regression and Permutationally Invariant Polynomial Approaches To Represent High-Dimensional Potential Energy Surfaces” Qu et at. J. Chem.Theory Comput.14, 3381 (2018)

Hydroxide Hydrate H₃O₂^-

H3O2M @ 6dade4a submodule is linked to a GitHub repository with sGDML potential and the corresponding dataset for Hydroxide Hydrate.

The dataset was described and first reported in Mrinal Arandhara and Sai G. Ramesh “Nuclear Quantum Effects in Hydroxide Hydrate Along the H-Bond Bifurcation Pathway”. J. Phys. Chem. A 2024, 128, 1600-1610.

It was subsequently used in Priyanka Pandey, Mrinal Arandhara, Paul L. Houston, Chen Qu, Riccardo Conte, Joel M. Bowman, and Sai G. Ramesh, “Assessing Permutationally Invariant Polynomial and Symmetric Gradient Domain Machine Learning Potential Energy Surfaces for H3O2-” J. Phys. Chem. A 2024, 128, 3212–3219

Summary