:term:`INTERFRAG_DIST_INV <INTERFRAG_DIST_INV (OPTKING)>`
"""""""""""""""""""""""""""""""""""""""""""""""""""""""""

      Do use :math:`\frac{1}{R_{AB}}` for the stretching coordinate between fragments? Otherwise, use :math:`R_{AB}`.

      * **Type**: :ref:`boolean <op_c_boolean>`
      * **Default**: false

