"comment"># dinuclear copper ion</span></div><div class="line"><a name="l00208"></a><span class="lineno">  208</span>&#160;                                              <span class="stringliteral">&#39;V&#39;</span>,  <span class="comment"># vanadium ion</span></div><div class="line"><a name="l00209"></a><span class="lineno">  209</span>&#160;                                              <span class="stringliteral">&#39;CUO&#39;</span>,  <span class="comment"># cu2-o2 cluster</span></div><div class="line"><