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  • Bond length from infrared spectra? - Matter Modeling Stack Exchange
    If you know the bond lengths of few such compounds, you can derive a very accurate linear correlation between the bond length and the frequency So while you can't directly predict bond lengths from IR alone, you can likely develop a correlation between a particular IR frequency and bond length for a series of related compounds
  • How may I calculate the bond length between two atoms?
    Bond formation could be something like 1-P $_ {break}$ You could also run quantum calculations for all possible pairs (or higher order clusters) of atoms or hit the literature to look up experimental bond strengths for greater accuracy
  • What are the types of bond orders? - Matter Modeling Stack Exchange
    Laplacian Bond Order This method is an extension of the QTAIM (Quantum Theory of Atoms In Molecules) concept of using the Laplacian of the electron density $\nabla^2\rho$ to characterize bonding Standard QTAIM just uses the value of $\nabla^2\rho$ at bond critical points (minimum electron density along the bond, max along orthogonal directions), but these values are unintuitive and often don
  • Lost atoms in LAMMPS - Matter Modeling Stack Exchange
    HI @Magic_Number, after running with more recorded timestep, I think the main reason is because the molecule pass through zlo and have atom deleted, as result, the bond connecting that atom is lost But I know having a fixed z boundary is possible to run because that's what I found from several lammps papers
  • Maximum bond length in Vesta - Matter Modeling Stack Exchange
    I need some cutoff radii to count bonds between different atoms in my system When a cif file is opened in Vesta, there are some default values of min and max bond lengths between two atomic speci
  • density functional theory - How to calculate homolytic bond . . .
    An experimental colleague asked me how hard it would be to calculate homolytic bond-dissociation energies for different phosphonates which are involved in a Hydrophosphination The compounds include
  • How to plot molecules with angles and bond lengths
    I want to make a plot like the one in the picture, with bond lengths on top and a second one with bond angles Again, plotting the molecule, calculating the bond angles and lengths is easy
  • What is the bond length of O2--? - Matter Modeling Stack Exchange
    The real bond length could be obtained by doing a CBS extrapolation using FCI-level calculations with aug-cc-pCV8Z and aug-cc-pCV9Z, then adding corrections for relativity, QED, Born-Oppenheimer breakdown, finite nuclear size effects, etc ) and perhaps calculating a full potential energy curve and solving the rovibrational Schroedinger equation
  • Is it possible to do a Gaussian redundant scan with some fixed bonds?
    The last line indicates that the bond (B) between atoms 5 and 6 are scanned (S) with 20 steps of size -0 1 Angstrom In the image you posted in the question, the bond between 5 and 6 is long, so during the scan, the bond length would have to decrease which is why the step size is negative
  • Simulating breaking bonds in molecular dynamics
    Very short answer: No, classical molecular dynamics cannot break bonds The potential you showed is the most common form of bond, the harmonic potential a k a Hookes law If you have ever broken a bond in QM (calculated a dissociation curve), you know it is a bit tricky, you need to use "unrestricted" settings, meaning, that a given pair of electrons does not need share the same orbital As





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