<?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%">Laura P.C. Lee</style></author><author><style face="normal" font="default" size="100%">Cecilia Chiu</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Thiosemicarbazide complexes of mercury (II) halides</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%">1978</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://doi.org/10.1139/v78-414</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">56</style></volume><pages><style face="normal" font="default" size="100%">2526-2529</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">Dibromobis(thiosemicarbazide)mercury(II), HgBr&lt;sub&gt;2&lt;/sub&gt;(tsc)&lt;sub&gt;2&lt;/sub&gt;, is isostructural with dichlorobis-(thiosemicarbazide)mercury(II). The crystal is orthorhombic with&amp;nbsp;&lt;i&gt;a&lt;/i&gt; = 8.825(9),&amp;nbsp;&lt;i&gt;b&lt;/i&gt; = 8.587(11),&amp;nbsp;&lt;i&gt;c&lt;/i&gt; = 15.939(22) Å,&amp;nbsp;&lt;i&gt;Z&lt;/i&gt; = 4, space group&amp;nbsp;&lt;i&gt;Pbcn&lt;/i&gt;. Some bond lengths and angles are: Hg—Br = 2.860(4) Å, Hg—S = 2.45(1) Å, C—S = 1.76(4) Å and&amp;nbsp;&lt;img alt=&quot;&quot; src=&quot;http://www.nrcresearchpress.com/na101/home/literatum/publisher/nrc/journals/content/cjc/1978/cjc5619/v78-414/production/images/medium/v78-414c1.gif&quot;&gt;. In both HgCl&lt;sub&gt;2&lt;/sub&gt;(tsc)&lt;sub&gt;2&lt;/sub&gt;&amp;nbsp;and HgBr&lt;sub&gt;2&lt;/sub&gt;(tsc)&lt;sub&gt;2&lt;/sub&gt;, the configuration of the coordinated thiosemicarbazide (tsc) is the same as that of the free molecule. The ir and Raman (R) spectra for the complexes and tsc in the region 300–1600 cm&lt;sup&gt;−1&lt;/sup&gt;&amp;nbsp;are very similar. The strong band at 800 (807 R) cm&lt;sup&gt;−1&lt;/sup&gt;&amp;nbsp;in the tsc due to v(C—S) is shifted to 773 (796 R), 777 (796 R), and 660 (680 R) cm&lt;sup&gt;−1&lt;/sup&gt;&amp;nbsp;for HgCl&lt;sub&gt;2&lt;/sub&gt;&lt;sup&gt;−&lt;/sup&gt;(tsc)&lt;sub&gt;2&lt;/sub&gt;, HgBr&lt;sub&gt;2&lt;/sub&gt;(tsc)&lt;sub&gt;2&lt;/sub&gt;, and HgCl&lt;sub&gt;2&lt;/sub&gt;(tsc) correspondingly. A strong band at 368 (R) cm&lt;sup&gt;−1&lt;/sup&gt;&amp;nbsp;present uniquely for HgCl&lt;sub&gt;2&lt;/sub&gt;(tsc) can be assigned to v(Hg—N), The halides in HgX&lt;sub&gt;2&lt;/sub&gt;(tsc)&lt;sub&gt;2&lt;/sub&gt;&amp;nbsp;are bonded to one mercury(II) ion and weakly bridged to a neighboring molecule with Hg … Cl = 3.250(3) Å and Hg…Br = 3.436(4) Å. As a result, two Raman bands due to Hg—X are expected. For HgCl&lt;sub&gt;2&lt;/sub&gt;(tsc)&lt;sub&gt;2&lt;/sub&gt;, the two Raman bands occur at 236 and 166 cm&lt;sup&gt;−1&lt;/sup&gt;, whereas for HgBr&lt;sub&gt;2&lt;/sub&gt;(tsc)&lt;sub&gt;2&lt;/sub&gt;, one was observed at 190 cm&lt;sup&gt;−1&lt;/sup&gt;&amp;nbsp;but the other was masked by lattice modes. In HgCl&lt;sub&gt;2&lt;/sub&gt;(tsc), the two Hg—Cl bonds are different and bands at 220 and 190 cm&lt;sup&gt;−1&lt;/sup&gt;&amp;nbsp;are assigned to v(Hg—Cl)&lt;sub&gt;t&lt;/sub&gt;.</style></abstract><issue><style face="normal" font="default" size="100%">19</style></issue></record></records></xml>