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- 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
- 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
- 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
- How may I estimate the bond energy of a molecule?
Can I estimate the bond energy by running a single Gaussian calculation of the fragments at very long separation (say, 40 angstroms)? Or do I have to calculate each fragment without the other?
- 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
- 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
- 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
- Plotting of natural bond orbitals (NBOs) - Matter Modeling Stack Exchange
Which quantum chemistry programs can compute natural bond orbitals (NBOs)? Which visualisation tools can I use subsequently to plot pictures of the NBOs?
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