<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Chung Chieh</style></author><author><style face="normal" font="default" size="100%">Gerald E. Toogood</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">The Structure of (NO)&lt;sub&gt;2&lt;/sub&gt;[Ho(NO&lt;sub&gt;3&lt;/sub&gt;)&lt;sub&gt;5&lt;/sub&gt;], A 10-Coordinate Species</style></title><secondary-title><style face="normal" font="default" size="100%">Canadian Journal of Chemistry</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">1975</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://doi.org/10.1139/v75-116</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">53</style></volume><pages><style face="normal" font="default" size="100%">831-835</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">Nitrosonium pentanitratoholmate(III), (NO)&lt;sub&gt;2&lt;/sub&gt;Ho(NO&lt;sub&gt;3&lt;/sub&gt;)&lt;sub&gt;5&lt;/sub&gt;, was prepared from holmium metal and dinitrogen tetroxide in anhydrous ethyl acetate. Its crystals are monoclinic with&amp;nbsp;&lt;i&gt;a&lt;/i&gt; = 8.094,&amp;nbsp;&lt;i&gt;b&lt;/i&gt; = 11.979, c = 14.170 Å and β = 104.7°,&lt;i&gt;Z&lt;/i&gt;&amp;nbsp;= 4, space group&amp;nbsp;&lt;i&gt;P&lt;/i&gt;2&lt;sub&gt;1&lt;/sub&gt;/&lt;i&gt;c&lt;/i&gt;. The structure was solved by the heavy-atom method and refined by full matrix least-squares methods to an&amp;nbsp;&lt;i&gt;R&lt;/i&gt;&amp;nbsp;value of 0.085 for 1514 observed reflections measured on the G.E. XRD-6 diffractometer. The structure consists of one Ho(NO&lt;sub&gt;3&lt;/sub&gt;)&lt;sub&gt;5&lt;/sub&gt;&lt;sup&gt;2−&lt;/sup&gt;&amp;nbsp;and two NO&lt;sup&gt;+&lt;/sup&gt;&amp;nbsp;ions. The holmium is 10-coordinated by five essentially symmetric bidentate nitrate groups which arrange themselves in a trigonal bipyramidal fashion around the metal with a mean Ho—O distance of 2.45 Å. The two NO&lt;sup&gt;+&lt;/sup&gt;&amp;nbsp;ions per metal occupy slightly different environments and give rise to two i.r. bands at 2250 and 2285 cm&lt;sup&gt;−1&lt;/sup&gt;, attributable to the (N, O&lt;sup&gt;+&lt;/sup&gt;) stretching vibration. The mean N—O distance within these ions is 1.00 Å.</style></abstract><issue><style face="normal" font="default" size="100%">6</style></issue></record></records></xml>