{"id":2805,"date":"1988-06-15T20:40:12","date_gmt":"1988-06-16T01:40:12","guid":{"rendered":"https:\/\/kermitmurray.com\/research\/?p=2805"},"modified":"2021-10-15T20:47:52","modified_gmt":"2021-10-16T01:47:52","slug":"photoelectron-spectroscopy-of-halocarbene-anions","status":"publish","type":"post","link":"https:\/\/kermitmurray.com\/research\/1988\/06\/photoelectron-spectroscopy-of-halocarbene-anions\/","title":{"rendered":"Photoelectron spectroscopy of halocarbene anions"},"content":{"rendered":"\n<p>K.K. Murray, D.G. Leopold, T.M. Miller, W.C. Lineberger, Photoelectron spectroscopy of the halocarbene anions HCF<sup>\u2212<\/sup>, HCCl<sup>\u2212<\/sup>, HCBr<sup>\u2212<\/sup>, HCI<sup>\u2212<\/sup>, CF<sub>2<\/sub><sup>\u2212<\/sup>, and CCl<sub>2<\/sub><sup>\u2212<\/sup>, <em>J. Chem Phys<\/em>, <strong>89<\/strong> (1988) 5442-5453; doi: <a href=\"http:\/\/aip.scitation.org\/doi\/10.1063\/1.455596\">1<\/a><a href=\"http:\/\/dx.doi.org\/10.1063\/1.455596\">0.1063\/1.455596<\/a><\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Abstract<\/h4>\n\n\n\n<p>The 488 nm photoelectron spectra are reported for the HCX(X\u03031A\u2019)+e\u2212\u2190HCX\u2212(X\u03032A\u2018) and HCX(a\u03033A\u2018)+e\u2212\u2190HCX\u2212(X\u03032A\u2018) transitions in HCF\u2212, DCF\u2212, HCCl\u2212, HCBr\u2212, and HCI\u2212 and for the CX2(X\u03031A1)+e\u2212\u2190CX\u22122(X\u03032B1) transitions in CF\u22122 and CCl\u22122 . Adiabatic electron affinities are found to be 0.557\u00b10.005 eV (HCF), 0.552\u00b10.005 eV (DCF), 1.213\u00b10.005 eV (HCCl), 1.556\u00b10.008 eV (HCBr), 1.683\u00b10.012 eV (HCI), 0.179\u00b10.005 eV (CF2), and 1.603 \u00b1 0.008 eV (CCl2). Bounds for the triplet excitation energies are determined for all the halocarbenes for which photoelectron spectra were observed, with the exception of CCl2. For the HCX halocarbenes, upper bounds for the triplet excitation energies are 14.7\u00b10.2 kcal\/mol (HCF, DCF), 11.4\u00b10.3 kcal\/mol (HCCl), and 9\u00b12 kcal\/mol (HCBr). A more detailed analysis of HCF suggests the actual triplet excitation energy to be 11.4\u00b10.3 kcal\/mol, 14.7\u00b10.2 kcal\/mol, or 8.1\u00b10.4 kcal\/mol, with the first value the most likely. Since the multiplicity of the ground state of HCl is not known, we report the energy of its first excited state to be less than 9\u00b12 kcal\/mol. The absence of an observed triplet state in the CF\u22122 photoelectron spectrum allows us to assign a lower bound on the triplet excitation energy of CF2 of 50 \u00b1 2 kcal\/mol.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>K.K. Murray, D.G. Leopold, T.M. Miller, W.C. Lineberger, Photoelectron spectroscopy of the halocarbene anions HCF\u2212, HCCl\u2212, HCBr\u2212, HCI\u2212, CF2\u2212, and CCl2\u2212, J. Chem Phys, 89 (1988) 5442-5453; doi: 10.1063\/1.455596 Abstract The 488 nm photoelectron spectra are reported for the HCX(X\u03031A\u2019)+e\u2212\u2190HCX\u2212(X\u03032A\u2018) and HCX(a\u03033A\u2018)+e\u2212\u2190HCX\u2212(X\u03032A\u2018) transitions in HCF\u2212, DCF\u2212, HCCl\u2212, HCBr\u2212, and HCI\u2212 and for the CX2(X\u03031A1)+e\u2212\u2190CX\u22122(X\u03032B1) transitions &hellip; <\/p>\n<p class=\"link-more\"><a href=\"https:\/\/kermitmurray.com\/research\/1988\/06\/photoelectron-spectroscopy-of-halocarbene-anions\/\" class=\"more-link\">Continue reading<span class=\"screen-reader-text\"> &#8220;Photoelectron spectroscopy of halocarbene anions&#8221;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[130],"tags":[],"class_list":["post-2805","post","type-post","status-publish","format-standard","hentry","category-colorado","entry"],"_links":{"self":[{"href":"https:\/\/kermitmurray.com\/research\/wp-json\/wp\/v2\/posts\/2805","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kermitmurray.com\/research\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kermitmurray.com\/research\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kermitmurray.com\/research\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/kermitmurray.com\/research\/wp-json\/wp\/v2\/comments?post=2805"}],"version-history":[{"count":3,"href":"https:\/\/kermitmurray.com\/research\/wp-json\/wp\/v2\/posts\/2805\/revisions"}],"predecessor-version":[{"id":2808,"href":"https:\/\/kermitmurray.com\/research\/wp-json\/wp\/v2\/posts\/2805\/revisions\/2808"}],"wp:attachment":[{"href":"https:\/\/kermitmurray.com\/research\/wp-json\/wp\/v2\/media?parent=2805"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kermitmurray.com\/research\/wp-json\/wp\/v2\/categories?post=2805"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kermitmurray.com\/research\/wp-json\/wp\/v2\/tags?post=2805"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}