def _bond_angles(vectors):
  """
  Creates a list of angles (In degrees) between all two-element combinations
  in vectors.

  Parameters
  ----------
  vectors : scitbx.matrix.col

  Returns
  -------
  list of float
  """

  return [(v1, v2, v1.angle(v2, deg=True))
          for index, v1 in enumerate(vectors)
          for v2 in vectors[index + 1:]]