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The OPLS (Optimized Potentials for Liquid Simulations) force field was developed by Prof. William L. Jorgensen at Purdue University and later at Yale University, and is being further developed commercially by Schrödinger, Inc.
OPLS-AA, MMFF, GBSA solvent model, conformational sampling, minimizing, MD. Includes the Maestro GUI which provides visualizing, molecule building, calculation setup, job launch and monitoring, project-level organizing of results, access to a suite of other modelling programs.
Number of consonants denotes number of oxygen atoms. Number of vowels denotes negative charge quantity. Inclusion of the word "ate" signifies that each ends with the letters a-t-e. To use this for the -ite ions, simply subtract one oxygen but keep the charge the same.
Most commonly, by writing the constituent B, C, N, O, P and S atoms in lower-case forms b, c, n, o, p and s, respectively. In the latter case, bonds between two aromatic atoms are assumed (if not explicitly shown) to be aromatic bonds. Thus, benzene, pyridine and furan can be represented respectively by the SMILES c1ccccc1, n1ccccc1 and o1cccc1.
OPLS AMBER CHARMM GAFF MMFF QVBMM UFF Comments Abalone: UA 94, 96, 99SB, 03, GS, ii, Automatic FF generator [1] No No No No UFF-Dreiding-like field For proteins, DNA, ligands AMBER: Yes Yes Via chamber tool since v11 Yes No No No Ascalaph Designer: UA 94, 99SB, 03 No No No No No Avogadro: No No No Yes 94, 94s No Yes Balloon: No No No No 94 No ...
Part of force field of ethane for the C-C stretching bond. In the context of chemistry, molecular physics, physical chemistry, and molecular modelling, a force field is a computational model that is used to describe the forces between atoms (or collections of atoms) within molecules or between molecules as well as in crystals.
In the context of chemistry and molecular modelling, the Interface force field (IFF) is a force field for classical molecular simulations of atoms, molecules, and assemblies up to the large nanometer scale, covering compounds from across the periodic table. [1]
SIESTA (Spanish Initiative for Electronic Simulations with Thousands of Atoms) is an original method and its computer program implementation, to efficiently perform electronic structure calculations and ab initio molecular dynamics simulations of molecules and solids.