CINXE.COM

<!DOCTYPE html>    <html lang="en-US">  <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width"> <title>April | 2017 | Crystallites</title> <link rel="profile" href="https://gmpg.org/xfn/11"> <link rel="pingback" href="https://blogs.iucr.org/crystallites/xmlrpc.php">  <link rel='dns-prefetch' href='//fonts.googleapis.com' /> <link rel='dns-prefetch' href='//s.w.org' /> <link href='https://fonts.gstatic.com' crossorigin rel='preconnect' /> <link rel="alternate" type="application/rss+xml" title="Crystallites » Feed" href="https://blogs.iucr.org/crystallites/feed/" /> <link rel="alternate" type="application/rss+xml" title="Crystallites » Comments Feed" href="https://blogs.iucr.org/crystallites/comments/feed/" /> <script type="text/javascript"> window._wpemojiSettings = {"baseUrl":"https:\/\/s.w.org\/images\/core\/emoji\/12.0.0-1\/72x72\/","ext":".png","svgUrl":"https:\/\/s.w.org\/images\/core\/emoji\/12.0.0-1\/svg\/","svgExt":".svg","source":{"concatemoji":"https:\/\/blogs.iucr.org\/crystallites\/wp-includes\/js\/wp-emoji-release.min.js?ver=5.2.21"}}; !function(e,a,t){var n,r,o,i=a.createElement("canvas"),p=i.getContext&&i.getContext("2d");function s(e,t){var a=String.fromCharCode;p.clearRect(0,0,i.width,i.height),p.fillText(a.apply(this,e),0,0);e=i.toDataURL();return p.clearRect(0,0,i.width,i.height),p.fillText(a.apply(this,t),0,0),e===i.toDataURL()}function c(e){var t=a.createElement("script");t.src=e,t.defer=t.type="text/javascript",a.getElementsByTagName("head")[0].appendChild(t)}for(o=Array("flag","emoji"),t.supports={everything:!0,everythingExceptFlag:!0},r=0;r<o.length;r++)t.supports[o[r]]=function(e){if(!p||!p.fillText)return!1;switch(p.textBaseline="top",p.font="600 32px Arial",e){case"flag":return s([55356,56826,55356,56819],[55356,56826,8203,55356,56819])?!1:!s([55356,57332,56128,56423,56128,56418,56128,56421,56128,56430,56128,56423,56128,56447],[55356,57332,8203,56128,56423,8203,56128,56418,8203,56128,56421,8203,56128,56430,8203,56128,56423,8203,56128,56447]);case"emoji":return!s([55357,56424,55356,57342,8205,55358,56605,8205,55357,56424,55356,57340],[55357,56424,55356,57342,8203,55358,56605,8203,55357,56424,55356,57340])}return!1}(o[r]),t.supports.everything=t.supports.everything&&t.supports[o[r]],"flag"!==o[r]&&(t.supports.everythingExceptFlag=t.supports.everythingExceptFlag&&t.supports[o[r]]);t.supports.everythingExceptFlag=t.supports.everythingExceptFlag&&!t.supports.flag,t.DOMReady=!1,t.readyCallback=function(){t.DOMReady=!0},t.supports.everything||(n=function(){t.readyCallback()},a.addEventListener?(a.addEventListener("DOMContentLoaded",n,!1),e.addEventListener("load",n,!1)):(e.attachEvent("onload",n),a.attachEvent("onreadystatechange",function(){"complete"===a.readyState&&t.readyCallback()})),(n=t.source||{}).concatemoji?c(n.concatemoji):n.wpemoji&&n.twemoji&&(c(n.twemoji),c(n.wpemoji)))}(window,document,window._wpemojiSettings); </script> <style type="text/css"> img.wp-smiley, img.emoji { display: inline !important; border: none !important; box-shadow: none !important; height: 1em !important; width: 1em !important; margin: 0 .07em !important; vertical-align: -0.1em !important; background: none !important; padding: 0 !important; } </style> <link rel='stylesheet' id='wp-block-library-css' href='https://blogs.iucr.org/crystallites/wp-includes/css/dist/block-library/style.min.css?ver=5.2.21' type='text/css' media='all' /> <link rel='stylesheet' id='wp-block-library-theme-css' href='https://blogs.iucr.org/crystallites/wp-includes/css/dist/block-library/theme.min.css?ver=5.2.21' type='text/css' media='all' /> <link rel='stylesheet' id='twentythirteen-fonts-css' href='https://fonts.googleapis.com/css?family=Source+Sans+Pro%3A300%2C400%2C700%2C300italic%2C400italic%2C700italic%7CBitter%3A400%2C700&subset=latin%2Clatin-ext' type='text/css' media='all' /> <link rel='stylesheet' id='genericons-css' href='https://blogs.iucr.org/crystallites/wp-content/themes/twentythirteen/genericons/genericons.css?ver=3.0.3' type='text/css' media='all' /> <link rel='stylesheet' id='twentythirteen-style-css' href='https://blogs.iucr.org/crystallites/wp-content/themes/twentythirteen/style.css?ver=2013-07-18' type='text/css' media='all' /> <link rel='stylesheet' id='twentythirteen-block-style-css' href='https://blogs.iucr.org/crystallites/wp-content/themes/twentythirteen/css/blocks.css?ver=2018-12-30' type='text/css' media='all' />  <script type='text/javascript' src='https://blogs.iucr.org/crystallites/wp-includes/js/jquery/jquery.js?ver=1.12.4-wp'></script> <script type='text/javascript' src='https://blogs.iucr.org/crystallites/wp-includes/js/jquery/jquery-migrate.min.js?ver=1.4.1'></script> <link rel='https://api.w.org/' href='https://blogs.iucr.org/crystallites/wp-json/' /> <link rel="EditURI" type="application/rsd+xml" title="RSD" href="https://blogs.iucr.org/crystallites/xmlrpc.php?rsd" /> <link rel="wlwmanifest" type="application/wlwmanifest+xml" href="https://blogs.iucr.org/crystallites/wp-includes/wlwmanifest.xml" /> <meta name="generator" content="WordPress 5.2.21" /> <style type="text/css" id="twentythirteen-header-css"> .site-header { background: url(https://blogs.iucr.org/crystallites/files/2019/05/cropped-10.jpg) no-repeat scroll top; background-size: 1600px auto; } @media (max-width: 767px) { .site-header { background-size: 768px auto; } } @media (max-width: 359px) { .site-header { background-size: 360px auto; } } .site-title, .site-description { color: #ffffff; } </style> <style type="text/css" id="wp-custom-css"> a:link, a:visited, a:active { color:#660000; text-decoration: none; } a:hover { color: #990000; text-decoration: none; } header#masthead{ padding-top: 12px; } h1.site-title { height: 72px; font-family: Arial, Helvetica, sans-serif; padding-top: 4px; background-image: url("https://www.iucr.org/__data/assets/image/0020/2819/iucr.gif"); background-repeat: no-repeat; padding-left:72px; } .site-header .site-title:hover { text-decoration: none; } .site-header .home-link { min-height:128px !important; } .site-description{ font-size: 20px; } .entry-title{ margin: 16px 0 10px; } h1,h2,h3,h4,h5,h6 { font-family: Georgia, Bitter, serif; } h1 { font-size: 32px; margin: 30px 0; } h2 { font-size: 20px; margin: 25px 0; } h3 { font-size: 18px; margin: 18px 0; } h4 { font-size: 16px; margin: 16px 0; } h5 { font-size: 14px; margin: 14px 0; } h6 { font-size: 12px; margin: 12px 0; } .navbar, .format-aside, .format-link, .comment-respond, .no-comments, .site-footer, .paging-navigation, .archive-header, .page-header { background-color: whitesmoke; } .archive-title, .archive-meta { font-size: 20px; } </style> </head> <body data-rsssl=1 class="archive date wp-embed-responsive sidebar"> <div id="page" class="hfeed site"> <header id="masthead" class="site-header" role="banner"> <a class="home-link" href="https://blogs.iucr.org/crystallites/" title="Crystallites" rel="home"> <h1 class="site-title">Crystallites</h1> <h2 class="site-description">News and opinion in crystallography</h2> </a> <div id="navbar" class="navbar"> <nav id="site-navigation" class="navigation main-navigation" role="navigation"> <button class="menu-toggle">Menu</button> <a class="screen-reader-text skip-link" href="#content" title="Skip to content">Skip to content</a> <div class="menu-pages-container"><ul id="primary-menu" class="nav-menu"><li id="menu-item-491" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-491"><a href="https://blogs.iucr.org/crystallites/about/">About</a></li> <li id="menu-item-492" class="menu-item menu-item-type-taxonomy menu-item-object-category menu-item-492"><a href="https://blogs.iucr.org/crystallites/category/general/">General</a></li> <li id="menu-item-493" class="menu-item menu-item-type-taxonomy menu-item-object-category menu-item-493"><a href="https://blogs.iucr.org/crystallites/category/news-and-opinion/">News and opinion</a></li> <li id="menu-item-494" class="menu-item menu-item-type-taxonomy menu-item-object-category menu-item-494"><a href="https://blogs.iucr.org/crystallites/category/education/">Education</a></li> <li id="menu-item-495" class="menu-item menu-item-type-taxonomy menu-item-object-category menu-item-495"><a href="https://blogs.iucr.org/crystallites/category/membership/">Membership</a></li> </ul></div> <form role="search" method="get" class="search-form" action="https://blogs.iucr.org/crystallites/"> <label> <span class="screen-reader-text">Search for:</span> <input type="search" class="search-field" placeholder="Search …" value="" name="s" /> </label> <input type="submit" class="search-submit" value="Search" /> </form> </nav> </div> </header> <div id="main" class="site-main"> <div id="primary" class="content-area"> <div id="content" class="site-content" role="main"> <header class="archive-header"> <h1 class="archive-title"> Monthly Archives: April 2017 </h1> </header> <article id="post-207" class="post-207 post type-post status-publish format-standard hentry category-general category-news-and-opinion"> <header class="entry-header"> <h1 class="entry-title"> <a href="https://blogs.iucr.org/crystallites/2017/04/20/coordination-chemistry-of-anions-through-halogen%e2%80%93bonding-interactions/" rel="bookmark">Coordination chemistry of anions through halogen–bonding interactions</a> </h1> <div class="entry-meta"> <span class="date"><a href="https://blogs.iucr.org/crystallites/2017/04/20/coordination-chemistry-of-anions-through-halogen%e2%80%93bonding-interactions/" title="Permalink to Coordination chemistry of anions through halogen–bonding interactions" rel="bookmark"><time class="entry-date" datetime="2017-04-20T10:50:58+00:00">April 20, 2017</time></a></span><span class="categories-links"><a href="https://blogs.iucr.org/crystallites/category/general/" rel="category tag">General</a>, <a href="https://blogs.iucr.org/crystallites/category/news-and-opinion/" rel="category tag">News and opinion</a></span><span class="author vcard"><a class="url fn n" href="https://blogs.iucr.org/crystallites/author/jonathan/" title="View all posts by jonathan" rel="author">jonathan</a></span> </div> </header> <div class="entry-content"> <figure id="attachment_208" aria-describedby="caption-attachment-208" style="width: 150px" class="wp-caption alignright"><a href="https://blogs.iucr.org/crystallites/files/2017/04/me0644.jpg"><img class="size-thumbnail wp-image-208" src="https://blogs.iucr.org/crystallites/files/2017/04/me0644-150x150.jpg" alt="" width="150" height="150" srcset="https://blogs.iucr.org/crystallites/files/2017/04/me0644-150x150.jpg 150w, https://blogs.iucr.org/crystallites/files/2017/04/me0644-96x96.jpg 96w, https://blogs.iucr.org/crystallites/files/2017/04/me0644-24x24.jpg 24w, https://blogs.iucr.org/crystallites/files/2017/04/me0644-36x36.jpg 36w, https://blogs.iucr.org/crystallites/files/2017/04/me0644-48x48.jpg 48w, https://blogs.iucr.org/crystallites/files/2017/04/me0644-64x64.jpg 64w" sizes="(max-width: 150px) 100vw, 150px" /></a><figcaption id="caption-attachment-208" class="wp-caption-text">Detail of the coordination spheres of the bromide anion with Et3BuN+Br−</figcaption></figure> <p>While an IUPAC definition of hydrogen bonding was only released in 2011 after decades of discussions in the scientific community, it did not take such a long time to come up with an analogous definition of halogen bonding, following a revival of this interaction in the literature which can be traced back to the early 1990s, <a href="https://doi.org/10.1107/S2052520617004413">Fourmigué, M. (2017). <em>Acta Cryst.</em> B<strong>73</strong>, 138-139</a></p> <p>The halogen-bonding interaction is essentially described as an electrostatic interaction between a charge concentration (Lewis base) and a charge-depleted area, called an σ-hole, that a covalently bound halogen atom exhibits in the extension of this bond.</p> <p>In a recent paper by <a href="https://doi.org/10.1107/S2052520617000944">Szell <em>et al</em>, (2017). <em>Acta Cryst. </em>B<strong>73</strong>, 153-162</a> single-crystal X-ray diffraction structures have been reported for a series of seven halogen-bonded co-crystals featuring 1,3,5-tris(iodoethynyl)-2,4,6-trifluorobenzene as the halogen-bond donor, and bromide ions (as ammonium or phosphonium salts) as the halogen-bond acceptors. Depending on the stoichiometry, the resulting frameworks can form honeycomb structures of variable geometry, but also systems with four or six halogen bonds to the bromide ion. While the counter-cations generally occupy the void spaces in the present work, the construction of halogen-bonded frameworks with potential gas storage applications is an appealing prospect which may be facilitated in the future by ligands enabling directional and multidentate interactions.</p> <p> </p> </div> <footer class="entry-meta"> <div class="comments-link"> <a href="https://blogs.iucr.org/crystallites/2017/04/20/coordination-chemistry-of-anions-through-halogen%e2%80%93bonding-interactions/#respond"><span class="leave-reply">Leave a comment</span></a> </div> </footer> </article> </div> </div> <div id="tertiary" class="sidebar-container" role="complementary"> <div class="sidebar-inner"> <div class="widget-area"> <aside id="calendar-5" class="widget widget_calendar"><div id="calendar_wrap" class="calendar_wrap"><table id="wp-calendar"> <caption>April 2017</caption> <thead> <tr> <th scope="col" title="Monday">M</th> <th scope="col" title="Tuesday">T</th> <th scope="col" title="Wednesday">W</th> <th scope="col" title="Thursday">T</th> <th scope="col" title="Friday">F</th> <th scope="col" title="Saturday">S</th> <th scope="col" title="Sunday">S</th> </tr> </thead> <tfoot> <tr> <td colspan="3" id="prev"><a href="https://blogs.iucr.org/crystallites/2017/03/">« Mar</a></td> <td class="pad"> </td> <td colspan="3" id="next"><a href="https://blogs.iucr.org/crystallites/2017/05/">May »</a></td> </tr> </tfoot> <tbody> <tr> <td colspan="5" class="pad"> </td><td>1</td><td>2</td> </tr> <tr> <td>3</td><td>4</td><td>5</td><td>6</td><td>7</td><td>8</td><td>9</td> </tr> <tr> <td>10</td><td>11</td><td>12</td><td>13</td><td>14</td><td>15</td><td>16</td> </tr> <tr> <td>17</td><td>18</td><td>19</td><td><a href="https://blogs.iucr.org/crystallites/2017/04/20/" aria-label="Posts published on April 20, 2017">20</a></td><td>21</td><td>22</td><td>23</td> </tr> <tr> <td>24</td><td>25</td><td>26</td><td>27</td><td>28</td><td>29</td><td>30</td> </tr> </tbody> </table></div></aside> </div> </div> </div> </div> <footer id="colophon" class="site-footer" role="contentinfo"> <div id="secondary" class="sidebar-container" role="complementary"> <div class="widget-area"> <aside id="pages-3" class="widget widget_pages"><h3 class="widget-title">Pages</h3> <ul> <li class="page_item page-item-2"><a href="https://blogs.iucr.org/crystallites/about/">About</a></li> </ul> </aside> <aside id="recent-posts-3" class="widget widget_recent_entries"> <h3 class="widget-title">Recent Posts</h3> <ul> <li> <a href="https://blogs.iucr.org/crystallites/2018/03/07/women-in-crystallography-we%e2%80%99re-not-just-historical/">Women in Crystallography – we’re not just historical</a> </li> <li> <a href="https://blogs.iucr.org/crystallites/2017/12/22/getting-crystallography-to-regional-australia-a-scanz-initiative/">Getting crystallography to regional Australia, a SCANZ initiative</a> </li> <li> <a href="https://blogs.iucr.org/crystallites/2017/11/27/the-iucr-associates-programme/">The IUCr Associates Programme</a> </li> <li> <a href="https://blogs.iucr.org/crystallites/2017/09/28/laamp-at-the-world-science-forum/">LAAMP at the World Science Forum</a> </li> <li> <a href="https://blogs.iucr.org/crystallites/2017/09/06/iucr-2017-hyderabadblog-day-8-monday-28-augustclosing-with-culture/">IUCr 2017 Hyderabad:Blog Day 8, Monday 28 August:Closing with culture</a> </li> </ul> </aside><aside id="categories-3" class="widget widget_categories"><h3 class="widget-title">Categories</h3> <ul> <li class="cat-item cat-item-7"><a href="https://blogs.iucr.org/crystallites/category/education/" title="Articles posted in this section will support the IUCr's ongoing activities in providing resources and links in teaching crystallography.">Education</a> </li> <li class="cat-item cat-item-1"><a href="https://blogs.iucr.org/crystallites/category/general/" title="General posts not falling within the other categories of education, membership or news and opinion">General</a> </li> <li class="cat-item cat-item-4"><a href="https://blogs.iucr.org/crystallites/category/membership/" title="The members of the Union are its Adhering Bodies. Each Adhering Body forms a National Committee for Crystallography to represent it in the Union. ">Membership</a> </li> <li class="cat-item cat-item-5"><a href="https://blogs.iucr.org/crystallites/category/news-and-opinion/" title="Research news and comment from IUCr Journals">News and opinion</a> </li> </ul> </aside><aside id="meta-4" class="widget widget_meta"><h3 class="widget-title">Meta</h3> <ul> <li><a href="https://blogs.iucr.org/crystallites/wp-login.php">Log in</a></li> <li><a href="https://blogs.iucr.org/crystallites/feed/">Entries <abbr title="Really Simple Syndication">RSS</abbr></a></li> <li><a href="https://blogs.iucr.org/crystallites/comments/feed/">Comments <abbr title="Really Simple Syndication">RSS</abbr></a></li> <li><a href="https://wordpress.org/" title="Powered by WordPress, state-of-the-art semantic personal publishing platform.">WordPress.org</a></li> </ul> </aside> </div> </div> <div class="site-info"> <a href="https://wordpress.org/" class="imprint"> Proudly powered by WordPress </a> </div> </footer> </div> <script type='text/javascript' src='https://blogs.iucr.org/crystallites/wp-includes/js/imagesloaded.min.js?ver=3.2.0'></script> <script type='text/javascript' src='https://blogs.iucr.org/crystallites/wp-includes/js/masonry.min.js?ver=3.3.2'></script> <script type='text/javascript' src='https://blogs.iucr.org/crystallites/wp-includes/js/jquery/jquery.masonry.min.js?ver=3.1.2b'></script> <script type='text/javascript' src='https://blogs.iucr.org/crystallites/wp-content/themes/twentythirteen/js/functions.js?ver=20160717'></script> <script type='text/javascript' src='https://blogs.iucr.org/crystallites/wp-includes/js/wp-embed.min.js?ver=5.2.21'></script> </body> </html>