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Benzene is the best-known aromatic compound, although numerous related hydrocarbons also manifest the property. Velian and Cummins now report a rare instance of an inorganic aromatic compound: a negatively charged pentagonal ring composed of three nitrogen and two phosphorus atoms.<\/jats:p>\n                  <jats:p>\n                    <jats:italic>Science<\/jats:italic>\n                    , this issue p.\n                    <jats:related-article xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"doi\" issue=\"6238\" page=\"1001\" related-article-type=\"in-this-issue\" vol=\"348\" xlink:href=\"10.1126\/science.aab0204\">1001<\/jats:related-article>\n                  <\/jats:p>","DOI":"10.1126\/science.aab0204","type":"journal-article","created":{"date-parts":[[2015,5,28]],"date-time":"2015-05-28T15:48:26Z","timestamp":1432828106000},"page":"1001-1004","source":"Crossref","is-referenced-by-count":117,"title":["Synthesis and characterization of P\n                    <sub>2<\/sub>\n                    N\n                    <sub>3<\/sub>\n                    <sup>\u2212<\/sup>\n                    : An aromatic ion composed of phosphorus and nitrogen"],"prefix":"10.1126","volume":"348","author":[{"given":"Alexandra","family":"Velian","sequence":"first","affiliation":[{"name":"Department of Chemistry, Massachusetts Institute of Technology, Cambridge, MA 02139, USA."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Christopher C.","family":"Cummins","sequence":"additional","affiliation":[{"name":"Department of Chemistry, Massachusetts Institute of Technology, Cambridge, MA 02139, USA."}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"221","reference":[{"key":"e_1_3_2_2_2","doi-asserted-by":"publisher","DOI":"10.1098\/rstl.1825.0022"},{"key":"e_1_3_2_3_2","doi-asserted-by":"publisher","DOI":"10.1021\/cr0103221"},{"key":"e_1_3_2_4_2","doi-asserted-by":"publisher","DOI":"10.1021\/cr0103221"},{"key":"e_1_3_2_5_2","doi-asserted-by":"publisher","DOI":"10.1021\/ic001394y"},{"key":"e_1_3_2_6_2","doi-asserted-by":"publisher","DOI":"10.1007\/s11224-007-9229-z"},{"key":"e_1_3_2_7_2","doi-asserted-by":"publisher","DOI":"10.1002\/1521-3773(20020816)41:16<3051::AID-ANIE3051>3.0.CO;2-T"},{"key":"e_1_3_2_8_2","doi-asserted-by":"publisher","DOI":"10.1002\/anie.201409868"},{"key":"e_1_3_2_9_2","doi-asserted-by":"publisher","DOI":"10.1002\/anie.198802801"},{"key":"e_1_3_2_10_2","doi-asserted-by":"publisher","DOI":"10.1002\/cber.19881210518"},{"key":"e_1_3_2_11_2","doi-asserted-by":"publisher","DOI":"10.1021\/ja075926m"},{"key":"e_1_3_2_12_2","doi-asserted-by":"publisher","DOI":"10.1021\/ja507922x"},{"key":"e_1_3_2_13_2","doi-asserted-by":"publisher","DOI":"10.1002\/anie.196305651"},{"key":"e_1_3_2_14_2","doi-asserted-by":"publisher","DOI":"10.1002\/1521-3773(20010601)40:11<2004::AID-ANIE2004>3.0.CO;2-5"},{"key":"e_1_3_2_15_2","doi-asserted-by":"publisher","DOI":"10.1002\/anie.200502475"},{"key":"e_1_3_2_16_2","doi-asserted-by":"publisher","DOI":"10.1039\/c3dt50505g"},{"key":"e_1_3_2_18_2","doi-asserted-by":"publisher","DOI":"10.1002\/chem.200901472"},{"key":"e_1_3_2_19_2","doi-asserted-by":"publisher","DOI":"10.1021\/ja00405a054"},{"key":"e_1_3_2_20_2","doi-asserted-by":"publisher","DOI":"10.1002\/chem.200390041"},{"key":"e_1_3_2_21_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.cplett.2008.12.004"},{"key":"e_1_3_2_22_2","doi-asserted-by":"crossref","unstructured":"AIMAll Version 14.11.23; aim.tkgristmill.com.","DOI":"10.1093\/iat\/11.1.14a"},{"key":"e_1_3_2_23_2","doi-asserted-by":"publisher","DOI":"10.1021\/cr00005a013"},{"key":"e_1_3_2_24_2","doi-asserted-by":"publisher","DOI":"10.1021\/ic00104a037"},{"key":"e_1_3_2_25_2","doi-asserted-by":"publisher","DOI":"10.1021\/cr030088+"},{"key":"e_1_3_2_26_2","doi-asserted-by":"publisher","DOI":"10.1021\/jo051746o"},{"key":"e_1_3_2_27_2","doi-asserted-by":"publisher","DOI":"10.1021\/jp202901f"},{"key":"e_1_3_2_29_2","doi-asserted-by":"publisher","DOI":"10.1080\/00268976.2012.661478"},{"key":"e_1_3_2_30_2","doi-asserted-by":"publisher","DOI":"10.1021\/ja00315a006"},{"key":"e_1_3_2_31_2","unstructured":"J. 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