{"id":10839,"date":"2013-07-08T13:42:25","date_gmt":"2013-07-08T12:42:25","guid":{"rendered":"http:\/\/www.ch.imperial.ac.uk\/rzepa\/blog\/?p=10839"},"modified":"2014-01-17T07:47:54","modified_gmt":"2014-01-17T07:47:54","slug":"hexacoordinate-hydrogen","status":"publish","type":"post","link":"https:\/\/www.ch.ic.ac.uk\/rzepa\/blog\/?p=10839","title":{"rendered":"Hexacoordinate hydrogen."},"content":{"rendered":"<div class=\"kcite-section\" kcite-section-id=\"10839\">\n<p>A feature of a blog which is quite different from a journal article is how rapidly a topic might evolve.\u00a0Thus I started a few days ago with the theme of dicarbon (C<sub>2<\/sub>), identifying a metal carbide that showed C<sub>2<\/sub> as a ligand, but which also entrapped a single carbon in hexa-coordinated mode. A comment was posted bringing attention to the origins of the discovery of hexacoordinated carbon, and we moved on to exploring the valency in one such species (CLi<sub>6<\/sub>). Here I ask if hydrogen itself might exhibit such coordination.<\/p>\n<div id=\"attachment_10842\" style=\"width: 249px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-10842\" class=\" wp-image-10842 \" onclick=\"jmolInitialize('..\/Jmol\/','JmolAppletSigned.jar');jmolSetAppletColor('white');jmolApplet([450,450],'load wp-content\/uploads\/2013\/07\/PIMHCO10.cif;');\" alt=\"Click for  3D.\" src=\"http:\/\/www.ch.imperial.ac.uk\/rzepa\/blog\/wp-content\/uploads\/2013\/07\/6-H.jpg\" width=\"239\" height=\"227\" \/><p id=\"caption-attachment-10842\" class=\"wp-caption-text\">Click for 3D.<\/p><\/div>\n<p>In fact, such a system was first reported as long ago as 1981<span id=\"cite_ITEM-10839-0\" name=\"citation\"><a href=\"#ITEM-10839-0\">[1]<\/a><\/span>. This contains a cobalt carbonyl anion of the type [Co<sub>6<\/sub>H(CO)<sub>15<\/sub>]<sup>&#8211;<\/sup>. The hexacoordinated hydrogen had a measured <sup>1<\/sup>H NMR chemical shift of 23.2 ppm (very low field), a value normally more associated with a proton rather than a hydride.<\/p>\n<p>What does quantum mechanics say about this system? The QTAIM (\u03c9B97XD\/6=311G(d,p) calculation<span id=\"cite_ITEM-10839-1\" name=\"citation\"><a href=\"#ITEM-10839-1\">[2]<\/a><\/span>) is shown below. The green spheres represent bond critical points, and indeed six surround the central hydrogen with octahedral coordination. The value of \u03c1(r) for these varies from 0.074 to 0.082 au, which is a higher electron density than might be found for <em>e.g.<\/em> a hydrogen bond (which is typically 0.020 &#8211; 0.010 au). The individual Co&#8230;H Wiberg bond order indices are ~0.1 (the total Wiberg bond index is 0.86).<\/p>\n<p><img decoding=\"async\" class=\"aligncenter size-full wp-image-10850\" alt=\"Co6H-QTAIM\" src=\"http:\/\/www.ch.imperial.ac.uk\/rzepa\/blog\/wp-content\/uploads\/2013\/07\/Co6H-QTAIM.jpeg\" width=\"480\" \/><\/p>\n<p>The computed <sup>1<\/sup>H chemical shift<span id=\"cite_ITEM-10839-2\" name=\"citation\"><a href=\"#ITEM-10839-2\">[3]<\/a><\/span> (relative to TMS) of the hydrogen is 30.8 ppm, which seems to agree with an interpretation based on a proton in the interstitial cavity. However, the NBO natural charge on this hydrogen is -0.41, for a valence population of 1.40 electrons (and a Rydberg population of 0.01), which makes it more of a hydride anion than a cationic proton. NBO characterises this electron population as &#8220;Lp&#8221; (Lone pair). One might conclude from these apparently opposed indications that the deshielding of the <sup>1<\/sup>H is less to do with its resemblance to a proton, and is more due to the local magnetic currents originating from the metal atoms.<\/p>\n<p>It is still nicely surprising that even an element as small as hydrogen can sustain hexa-coordination. It also reminds that although each of the coordinations is <em>via<\/em> what can reasonably be called a bond, the hydrogen nevertheless does not exceed its maximum valence electron shell electron count of two; \u00a0in that sense it is not hypervalent.<\/p>\n<h2>References<\/h2>\n    <ol class=\"kcite-bibliography csl-bib-body\"><li id=\"ITEM-10839-0\">D.W. Hart, R.G. Teller, C. Wei, R. Bau, G. Longoni, S. Campanella, P. Chini, and T.F. Koetzle, \"An interstitial hydrogen atom in a hexanuclear metal cluster: x-ray and neutron diffraction analysis of [(Ph3P)2N]+[HCo6(CO)15]-\", <i>Journal of the American Chemical Society<\/i>, vol. 103, pp. 1458-1466, 1981. <a href=\"https:\/\/doi.org\/10.1021\/ja00396a028\">https:\/\/doi.org\/10.1021\/ja00396a028<\/a>\n\n<\/li>\n<li id=\"ITEM-10839-1\">H.S. Rzepa, \"Gaussian Job Archive for C15HCo6O15(1-)\", 2013. <a href=\"https:\/\/doi.org\/10.6084\/m9.figshare.741232\">https:\/\/doi.org\/10.6084\/m9.figshare.741232<\/a>\n\n<\/li>\n<\/ol>\n\n<\/div> <!-- kcite-section 10839 -->","protected":false},"excerpt":{"rendered":"<p>A feature of a blog which is quite different from a journal article is how rapidly a topic might evolve.\u00a0Thus I started a few days ago with the theme of dicarbon (C2), identifying a metal carbide that showed C2 as a ligand, but which also entrapped a single carbon in hexa-coordinated mode. A comment was [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"activitypub_content_warning":"","activitypub_content_visibility":"","activitypub_max_image_attachments":5,"activitypub_interaction_policy_quote":"anyone","activitypub_status":"","footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[7,4],"tags":[237,1103,1104],"ppma_author":[2661],"class_list":["post-10839","post","type-post","status-publish","format-standard","hentry","category-hypervalency","category-interesting-chemistry","tag-chemical-shift","tag-metal-atoms","tag-metal-carbide"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Hexacoordinate hydrogen. - Henry Rzepa&#039;s Blog<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.ch.ic.ac.uk\/rzepa\/blog\/?p=10839\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Hexacoordinate hydrogen. - Henry Rzepa&#039;s Blog\" \/>\n<meta property=\"og:description\" content=\"A feature of a blog which is quite different from a journal article is how rapidly a topic might evolve.\u00a0Thus I started a few days ago with the theme of dicarbon (C2), identifying a metal carbide that showed C2 as a ligand, but which also entrapped a single carbon in hexa-coordinated mode. A comment was [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.ch.ic.ac.uk\/rzepa\/blog\/?p=10839\" \/>\n<meta property=\"og:site_name\" content=\"Henry Rzepa&#039;s Blog\" \/>\n<meta property=\"article:published_time\" content=\"2013-07-08T12:42:25+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2014-01-17T07:47:54+00:00\" \/>\n<meta property=\"og:image\" content=\"http:\/\/www.ch.imperial.ac.uk\/rzepa\/blog\/wp-content\/uploads\/2013\/07\/6-H.jpg\" \/>\n<meta name=\"author\" content=\"Henry Rzepa\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Henry Rzepa\" \/>\n\t<meta name=\"twitter:label2\" content=\"Estimated reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Hexacoordinate hydrogen. - Henry Rzepa&#039;s Blog","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.ch.ic.ac.uk\/rzepa\/blog\/?p=10839","og_locale":"en_GB","og_type":"article","og_title":"Hexacoordinate hydrogen. - Henry Rzepa&#039;s Blog","og_description":"A feature of a blog which is quite different from a journal article is how rapidly a topic might evolve.\u00a0Thus I started a few days ago with the theme of dicarbon (C2), identifying a metal carbide that showed C2 as a ligand, but which also entrapped a single carbon in hexa-coordinated mode. A comment was [&hellip;]","og_url":"https:\/\/www.ch.ic.ac.uk\/rzepa\/blog\/?p=10839","og_site_name":"Henry Rzepa&#039;s Blog","article_published_time":"2013-07-08T12:42:25+00:00","article_modified_time":"2014-01-17T07:47:54+00:00","og_image":[{"url":"http:\/\/www.ch.imperial.ac.uk\/rzepa\/blog\/wp-content\/uploads\/2013\/07\/6-H.jpg","type":"","width":"","height":""}],"author":"Henry Rzepa","twitter_card":"summary_large_image","twitter_misc":{"Written by":"Henry Rzepa","Estimated reading time":"2 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/www.ch.ic.ac.uk\/rzepa\/blog\/?p=10839#article","isPartOf":{"@id":"https:\/\/www.ch.ic.ac.uk\/rzepa\/blog\/?p=10839"},"author":{"name":"Henry Rzepa","@id":"https:\/\/www.ch.ic.ac.uk\/rzepa\/blog\/#\/schema\/person\/2b40f7b9c872a4dc1547e040a11b6281"},"headline":"Hexacoordinate hydrogen.","datePublished":"2013-07-08T12:42:25+00:00","dateModified":"2014-01-17T07:47:54+00:00","mainEntityOfPage":{"@id":"https:\/\/www.ch.ic.ac.uk\/rzepa\/blog\/?p=10839"},"wordCount":415,"commentCount":2,"image":{"@id":"https:\/\/www.ch.ic.ac.uk\/rzepa\/blog\/?p=10839#primaryimage"},"thumbnailUrl":"http:\/\/www.ch.imperial.ac.uk\/rzepa\/blog\/wp-content\/uploads\/2013\/07\/6-H.jpg","keywords":["chemical shift","metal atoms","metal carbide"],"articleSection":["Hypervalency","Interesting chemistry"],"inLanguage":"en-GB","potentialAction":[{"@type":"CommentAction","name":"Comment","target":["https:\/\/www.ch.ic.ac.uk\/rzepa\/blog\/?p=10839#respond"]}]},{"@type":"WebPage","@id":"https:\/\/www.ch.ic.ac.uk\/rzepa\/blog\/?p=10839","url":"https:\/\/www.ch.ic.ac.uk\/rzepa\/blog\/?p=10839","name":"Hexacoordinate hydrogen. - Henry Rzepa&#039;s Blog","isPartOf":{"@id":"https:\/\/www.ch.ic.ac.uk\/rzepa\/blog\/#website"},"primaryImageOfPage":{"@id":"https:\/\/www.ch.ic.ac.uk\/rzepa\/blog\/?p=10839#primaryimage"},"image":{"@id":"https:\/\/www.ch.ic.ac.uk\/rzepa\/blog\/?p=10839#primaryimage"},"thumbnailUrl":"http:\/\/www.ch.imperial.ac.uk\/rzepa\/blog\/wp-content\/uploads\/2013\/07\/6-H.jpg","datePublished":"2013-07-08T12:42:25+00:00","dateModified":"2014-01-17T07:47:54+00:00","author":{"@id":"https:\/\/www.ch.ic.ac.uk\/rzepa\/blog\/#\/schema\/person\/2b40f7b9c872a4dc1547e040a11b6281"},"breadcrumb":{"@id":"https:\/\/www.ch.ic.ac.uk\/rzepa\/blog\/?p=10839#breadcrumb"},"inLanguage":"en-GB","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.ch.ic.ac.uk\/rzepa\/blog\/?p=10839"]}]},{"@type":"ImageObject","inLanguage":"en-GB","@id":"https:\/\/www.ch.ic.ac.uk\/rzepa\/blog\/?p=10839#primaryimage","url":"http:\/\/www.ch.imperial.ac.uk\/rzepa\/blog\/wp-content\/uploads\/2013\/07\/6-H.jpg","contentUrl":"http:\/\/www.ch.imperial.ac.uk\/rzepa\/blog\/wp-content\/uploads\/2013\/07\/6-H.jpg"},{"@type":"BreadcrumbList","@id":"https:\/\/www.ch.ic.ac.uk\/rzepa\/blog\/?p=10839#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/www.ch.ic.ac.uk\/rzepa\/blog"},{"@type":"ListItem","position":2,"name":"Hexacoordinate hydrogen."}]},{"@type":"WebSite","@id":"https:\/\/www.ch.ic.ac.uk\/rzepa\/blog\/#website","url":"https:\/\/www.ch.ic.ac.uk\/rzepa\/blog\/","name":"Henry Rzepa&#039;s Blog","description":"Chemistry with a twist","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.ch.ic.ac.uk\/rzepa\/blog\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-GB"},{"@type":"Person","@id":"https:\/\/www.ch.ic.ac.uk\/rzepa\/blog\/#\/schema\/person\/2b40f7b9c872a4dc1547e040a11b6281","name":"Henry Rzepa","image":{"@type":"ImageObject","inLanguage":"en-GB","@id":"https:\/\/secure.gravatar.com\/avatar\/897b6740f7f599bca7942cdf7d7914af5988937ae0e3869ab09aebb87f26a731?s=96&d=blank&r=g370be3a7397865e4fd161aefeb0a5a85","url":"https:\/\/secure.gravatar.com\/avatar\/897b6740f7f599bca7942cdf7d7914af5988937ae0e3869ab09aebb87f26a731?s=96&d=blank&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/897b6740f7f599bca7942cdf7d7914af5988937ae0e3869ab09aebb87f26a731?s=96&d=blank&r=g","caption":"Henry Rzepa"},"description":"Henry Rzepa is Emeritus Professor of Computational Chemistry at Imperial College London.","sameAs":["https:\/\/orcid.org\/0000-0002-8635-8390"],"url":"https:\/\/www.ch.ic.ac.uk\/rzepa\/blog\/?author=1"}]}},"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/pDef7-2OP","jetpack-related-posts":[{"id":10733,"url":"https:\/\/www.ch.ic.ac.uk\/rzepa\/blog\/?p=10733","url_meta":{"origin":10839,"position":0},"title":"Is dicarbon (C2) a molecule of chemical interest?","author":"Henry Rzepa","date":"July 3, 2013","format":false,"excerpt":"C2\u00a0(dicarbon) is certainly interesting from a theoretical point of view. Whether or not it can be described as having a quadruple bond has induced much passionate discussion,,,. Its occurrence in space and in flames is also well-known. But does it have what might be called a conventional chemistry? Other highly\u2026","rel":"","context":"In &quot;Interesting chemistry&quot;","block_context":{"text":"Interesting chemistry","link":"https:\/\/www.ch.ic.ac.uk\/rzepa\/blog\/?cat=4"},"img":{"alt_text":"Click for  3D","src":"https:\/\/i0.wp.com\/www.ch.imperial.ac.uk\/rzepa\/blog\/wp-content\/uploads\/2013\/07\/LaOsC1.jpeg?resize=350%2C200","width":350,"height":200},"classes":[]},{"id":23686,"url":"https:\/\/www.ch.ic.ac.uk\/rzepa\/blog\/?p=23686","url_meta":{"origin":10839,"position":1},"title":"A reality-based suggestion for a molecule with a metal M\u2a78N quadruple bond.","author":"Henry Rzepa","date":"May 13, 2021","format":false,"excerpt":"I noted in an earlier post the hypothesized example of (CO)3Fe\u2a78C as exhibiting a carbon to iron quadruple bond and which might have precedent in known five-coordinate metal complexes where one of the ligands is a \"carbide\" or C ligand. I had previously mooted that the Fe\u2a78C combination might be\u2026","rel":"","context":"In &quot;crystal_structure_mining&quot;","block_context":{"text":"crystal_structure_mining","link":"https:\/\/www.ch.ic.ac.uk\/rzepa\/blog\/?cat=1745"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.ch.ic.ac.uk\/rzepa\/blog\/wp-content\/uploads\/2021\/05\/Screenshot-703-1024x818.jpg?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]},{"id":15992,"url":"https:\/\/www.ch.ic.ac.uk\/rzepa\/blog\/?p=15992","url_meta":{"origin":10839,"position":2},"title":"Celebrating Paul  Schleyer: searching for hidden treasures in the structures of metallocene complexes.","author":"Henry Rzepa","date":"April 2, 2016","format":false,"excerpt":"A celebration of the life and work of the great chemist\u00a0Paul von R. Schleyer was held this week in Erlangen, Germany. There were many fantastic talks given by some great chemists describing fascinating chemistry. Here I highlight the presentation\u00a0given by\u00a0Andy Streitwieser on the topic of organolithium chemistry, also a great\u2026","rel":"","context":"In &quot;Chemical IT&quot;","block_context":{"text":"Chemical IT","link":"https:\/\/www.ch.ic.ac.uk\/rzepa\/blog\/?cat=2"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":9778,"url":"https:\/\/www.ch.ic.ac.uk\/rzepa\/blog\/?p=9778","url_meta":{"origin":10839,"position":3},"title":"Lithiation of heteroaromatic rings: analogy to electrophilic substitution?","author":"Henry Rzepa","date":"March 16, 2013","format":false,"excerpt":"Functionalisation of a (hetero)aromatic ring by selectively (directedly) removing protons using the metal lithium is a relative mechanistic newcomer, compared to the pantheon of knowledge on\u00a0aromatic electrophilic substitution. Investigating the mechanism using quantum calculations poses some interesting challenges, ones I have not previously discussed on this blog. My model will\u2026","rel":"","context":"In &quot;Hypervalency&quot;","block_context":{"text":"Hypervalency","link":"https:\/\/www.ch.ic.ac.uk\/rzepa\/blog\/?cat=7"},"img":{"alt_text":"SUHBEC. CLICK FOR 3D.","src":"https:\/\/i0.wp.com\/www.ch.imperial.ac.uk\/rzepa\/blog\/wp-content\/uploads\/2013\/03\/SUHBEC.jpg?resize=350%2C200","width":350,"height":200},"classes":[]},{"id":21798,"url":"https:\/\/www.ch.ic.ac.uk\/rzepa\/blog\/?p=21798","url_meta":{"origin":10839,"position":4},"title":"Can a carbon radical act as a hydrogen bond acceptor?","author":"Henry Rzepa","date":"December 28, 2019","format":false,"excerpt":"Having shown that carbon as a carbene centre, C:\u00a0can act as a hydrogen bond acceptor, as seen from a search of crystal structures, I began to wonder if there is any chance that carbon as a radical centre, C\u2022 could do so as well.\u00a0Definitely a subversive thought, since radical centres\u2026","rel":"","context":"In &quot;crystal_structure_mining&quot;","block_context":{"text":"crystal_structure_mining","link":"https:\/\/www.ch.ic.ac.uk\/rzepa\/blog\/?cat=1745"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.ch.ic.ac.uk\/rzepa\/blog\/wp-content\/uploads\/2019\/12\/CH-1024x940.jpg?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]},{"id":19472,"url":"https:\/\/www.ch.ic.ac.uk\/rzepa\/blog\/?p=19472","url_meta":{"origin":10839,"position":5},"title":"What are the highest bond indices for main group and transition group elements?","author":"Henry Rzepa","date":"March 4, 2018","format":false,"excerpt":"A bond index (BI) approximately measures the totals of the bond orders at any given atom in a molecule. Here I ponder what the maximum values might be for elements with filled valence shells. Following Lewis in 1916 who proposed that the full valence shell for main group elements should\u2026","rel":"","context":"In &quot;Interesting chemistry&quot;","block_context":{"text":"Interesting chemistry","link":"https:\/\/www.ch.ic.ac.uk\/rzepa\/blog\/?cat=4"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]}],"jetpack_likes_enabled":false,"authors":[{"term_id":2661,"user_id":1,"is_guest":0,"slug":"admin","display_name":"Henry Rzepa","avatar_url":"https:\/\/secure.gravatar.com\/avatar\/897b6740f7f599bca7942cdf7d7914af5988937ae0e3869ab09aebb87f26a731?s=96&d=blank&r=g","0":null,"1":"","2":"","3":"","4":"","5":"","6":"","7":"","8":""}],"_links":{"self":[{"href":"https:\/\/www.ch.ic.ac.uk\/rzepa\/blog\/index.php?rest_route=\/wp\/v2\/posts\/10839","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ch.ic.ac.uk\/rzepa\/blog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.ch.ic.ac.uk\/rzepa\/blog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.ch.ic.ac.uk\/rzepa\/blog\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ch.ic.ac.uk\/rzepa\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=10839"}],"version-history":[{"count":23,"href":"https:\/\/www.ch.ic.ac.uk\/rzepa\/blog\/index.php?rest_route=\/wp\/v2\/posts\/10839\/revisions"}],"predecessor-version":[{"id":11949,"href":"https:\/\/www.ch.ic.ac.uk\/rzepa\/blog\/index.php?rest_route=\/wp\/v2\/posts\/10839\/revisions\/11949"}],"wp:attachment":[{"href":"https:\/\/www.ch.ic.ac.uk\/rzepa\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=10839"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ch.ic.ac.uk\/rzepa\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=10839"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ch.ic.ac.uk\/rzepa\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=10839"},{"taxonomy":"author","embeddable":true,"href":"https:\/\/www.ch.ic.ac.uk\/rzepa\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fppma_author&post=10839"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}