Retrieving "Bond Vectors" from the archives

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1. Molecular Coordinates

   Linked via "bond vectors"

   Bond Angles ($\theta_{ijk}$)
   A bond angle is defined by three connected atoms: $i, j,$ and $k$, where $j$ is the central atom. The angle $\theta{ijk}$ is the angle formed between the bond vectors $\mathbf{r}{ji}$ and $\mathbf{r}_{jk}$. Angles are typically restricted to the range $0^\circ < \theta \le 180^\circ$.
   Dihedral (Torsion) Angles ($\tau_{ijkl}$)