Reactive intermediates in the photochemistry of 4-diazo-2-pyrazolin-5-ones

Photolysis of 4-diazo-2-pyrazolin-5-ones in methanol gives a mixture of stereoisomeric methyl 3-aryl-(or alkyl-)azo-2-alkenoates. A study of the absorption spectra of the species generated upon steady-state photolyses in glasses at 77 K, in solution at 296 K, and by laser and lamp flash photolysis e...

Full description

Saved in:
Bibliographic Details
Published in:Canadian journal of chemistry 1984-11, Vol.62 (11), p.2456-2463
Main Authors: Umrigar, Pesi, Griffin, Gary W, Ege, Seyhan N, Adams, Alan D, Das, Paritosh K
Format: Article
Language:English
Subjects:
Chemistry
Exact sciences and technology
General and physical chemistry
Photochemistry
Physical chemistry of induced reactions (with radiations, particles and ultrasonics)
Citations: Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
cited_by cdi_FETCH-LOGICAL-c250t-f5d46ded48734f8ae9f3d93c98be809867c5f47c4d6a04ae1f5e70df168c9b53
cites
container_end_page 2463
container_issue 11
container_start_page 2456
container_title Canadian journal of chemistry
container_volume 62
creator Umrigar, Pesi
Griffin, Gary W
Ege, Seyhan N
Adams, Alan D
Das, Paritosh K
description Photolysis of 4-diazo-2-pyrazolin-5-ones in methanol gives a mixture of stereoisomeric methyl 3-aryl-(or alkyl-)azo-2-alkenoates. A study of the absorption spectra of the species generated upon steady-state photolyses in glasses at 77 K, in solution at 296 K, and by laser and lamp flash photolysis experiments suggests that a long-lived heterocyclic intermediate that we formulate as a carbene or its valence isomer, as well as a ketene generated by ring opening, are precursors to the esters.
doi_str_mv 10.1139/v84-423
format article
fullrecord <record><control><sourceid>pascalfrancis_nrcre</sourceid><recordid>TN_cdi_pascalfrancis_primary_8945252</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>8945252</sourcerecordid><originalsourceid>FETCH-LOGICAL-c250t-f5d46ded48734f8ae9f3d93c98be809867c5f47c4d6a04ae1f5e70df168c9b53</originalsourceid><addsrcrecordid>eNp90EtLAzEUBeAgCtYq_oVZiIIQzXMmWUrxSUGQ7oc0uWEi7cyQhML46420uNPVvQc-zuIgdEnJHaVc3--UwILxIzSjQhHMmabHaEYIUVgQwU7RWUqfJTaEyRl6-wBjc9hBFfoMcQsumAyppCp3UI3dkAfbwTakHKdq8JXARXwNmOFxiuXZhB5LPPSQztGJN5sEF4c7R6unx9XiBS_fn18XD0tsmSQZe-lE7cAJ1XDhlQHtudPcarUGRbSqGyu9aKxwtSHCAPUSGuI8rZXVa8nn6GZfa-OQUgTfjjFsTZxaStqfBdqyQFsWKPJqL0eTrNn4aHob0i9XWkgmWWG3e9ZHGyGBibb7p_P6b3xA7eg8_waffXbI</addsrcrecordid><sourcetype>Aggregation Database</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype></control><display><type>article</type><title>Reactive intermediates in the photochemistry of 4-diazo-2-pyrazolin-5-ones</title><source>EZB Free E-Journals</source><creator>Umrigar, Pesi ; Griffin, Gary W ; Ege, Seyhan N ; Adams, Alan D ; Das, Paritosh K</creator><creatorcontrib>Umrigar, Pesi ; Griffin, Gary W ; Ege, Seyhan N ; Adams, Alan D ; Das, Paritosh K</creatorcontrib><description>Photolysis of 4-diazo-2-pyrazolin-5-ones in methanol gives a mixture of stereoisomeric methyl 3-aryl-(or alkyl-)azo-2-alkenoates. A study of the absorption spectra of the species generated upon steady-state photolyses in glasses at 77 K, in solution at 296 K, and by laser and lamp flash photolysis experiments suggests that a long-lived heterocyclic intermediate that we formulate as a carbene or its valence isomer, as well as a ketene generated by ring opening, are precursors to the esters.</description><identifier>ISSN: 0008-4042</identifier><identifier>EISSN: 1480-3291</identifier><identifier>DOI: 10.1139/v84-423</identifier><identifier>CODEN: CJCHAG</identifier><language>eng</language><publisher>Ottawa, Canada: NRC Research Press</publisher><subject>Chemistry ; Exact sciences and technology ; General and physical chemistry ; Photochemistry ; Physical chemistry of induced reactions (with radiations, particles and ultrasonics)</subject><ispartof>Canadian journal of chemistry, 1984-11, Vol.62 (11), p.2456-2463</ispartof><rights>1985 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c250t-f5d46ded48734f8ae9f3d93c98be809867c5f47c4d6a04ae1f5e70df168c9b53</citedby></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,776,780,27901,27902</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&amp;idt=8945252$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Umrigar, Pesi</creatorcontrib><creatorcontrib>Griffin, Gary W</creatorcontrib><creatorcontrib>Ege, Seyhan N</creatorcontrib><creatorcontrib>Adams, Alan D</creatorcontrib><creatorcontrib>Das, Paritosh K</creatorcontrib><title>Reactive intermediates in the photochemistry of 4-diazo-2-pyrazolin-5-ones</title><title>Canadian journal of chemistry</title><addtitle>Revue canadienne de chimie</addtitle><description>Photolysis of 4-diazo-2-pyrazolin-5-ones in methanol gives a mixture of stereoisomeric methyl 3-aryl-(or alkyl-)azo-2-alkenoates. A study of the absorption spectra of the species generated upon steady-state photolyses in glasses at 77 K, in solution at 296 K, and by laser and lamp flash photolysis experiments suggests that a long-lived heterocyclic intermediate that we formulate as a carbene or its valence isomer, as well as a ketene generated by ring opening, are precursors to the esters.</description><subject>Chemistry</subject><subject>Exact sciences and technology</subject><subject>General and physical chemistry</subject><subject>Photochemistry</subject><subject>Physical chemistry of induced reactions (with radiations, particles and ultrasonics)</subject><issn>0008-4042</issn><issn>1480-3291</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1984</creationdate><recordtype>article</recordtype><recordid>eNp90EtLAzEUBeAgCtYq_oVZiIIQzXMmWUrxSUGQ7oc0uWEi7cyQhML46420uNPVvQc-zuIgdEnJHaVc3--UwILxIzSjQhHMmabHaEYIUVgQwU7RWUqfJTaEyRl6-wBjc9hBFfoMcQsumAyppCp3UI3dkAfbwTakHKdq8JXARXwNmOFxiuXZhB5LPPSQztGJN5sEF4c7R6unx9XiBS_fn18XD0tsmSQZe-lE7cAJ1XDhlQHtudPcarUGRbSqGyu9aKxwtSHCAPUSGuI8rZXVa8nn6GZfa-OQUgTfjjFsTZxaStqfBdqyQFsWKPJqL0eTrNn4aHob0i9XWkgmWWG3e9ZHGyGBibb7p_P6b3xA7eg8_waffXbI</recordid><startdate>19841101</startdate><enddate>19841101</enddate><creator>Umrigar, Pesi</creator><creator>Griffin, Gary W</creator><creator>Ege, Seyhan N</creator><creator>Adams, Alan D</creator><creator>Das, Paritosh K</creator><general>NRC Research Press</general><general>National Research Council of Canada</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope></search><sort><creationdate>19841101</creationdate><title>Reactive intermediates in the photochemistry of 4-diazo-2-pyrazolin-5-ones</title><author>Umrigar, Pesi ; Griffin, Gary W ; Ege, Seyhan N ; Adams, Alan D ; Das, Paritosh K</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c250t-f5d46ded48734f8ae9f3d93c98be809867c5f47c4d6a04ae1f5e70df168c9b53</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1984</creationdate><topic>Chemistry</topic><topic>Exact sciences and technology</topic><topic>General and physical chemistry</topic><topic>Photochemistry</topic><topic>Physical chemistry of induced reactions (with radiations, particles and ultrasonics)</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Umrigar, Pesi</creatorcontrib><creatorcontrib>Griffin, Gary W</creatorcontrib><creatorcontrib>Ege, Seyhan N</creatorcontrib><creatorcontrib>Adams, Alan D</creatorcontrib><creatorcontrib>Das, Paritosh K</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><jtitle>Canadian journal of chemistry</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Umrigar, Pesi</au><au>Griffin, Gary W</au><au>Ege, Seyhan N</au><au>Adams, Alan D</au><au>Das, Paritosh K</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Reactive intermediates in the photochemistry of 4-diazo-2-pyrazolin-5-ones</atitle><jtitle>Canadian journal of chemistry</jtitle><addtitle>Revue canadienne de chimie</addtitle><date>1984-11-01</date><risdate>1984</risdate><volume>62</volume><issue>11</issue><spage>2456</spage><epage>2463</epage><pages>2456-2463</pages><issn>0008-4042</issn><eissn>1480-3291</eissn><coden>CJCHAG</coden><abstract>Photolysis of 4-diazo-2-pyrazolin-5-ones in methanol gives a mixture of stereoisomeric methyl 3-aryl-(or alkyl-)azo-2-alkenoates. A study of the absorption spectra of the species generated upon steady-state photolyses in glasses at 77 K, in solution at 296 K, and by laser and lamp flash photolysis experiments suggests that a long-lived heterocyclic intermediate that we formulate as a carbene or its valence isomer, as well as a ketene generated by ring opening, are precursors to the esters.</abstract><cop>Ottawa, Canada</cop><pub>NRC Research Press</pub><doi>10.1139/v84-423</doi><tpages>8</tpages></addata></record>
fulltext fulltext
identifier ISSN: 0008-4042
ispartof Canadian journal of chemistry, 1984-11, Vol.62 (11), p.2456-2463
issn 0008-4042
1480-3291
language eng
recordid cdi_pascalfrancis_primary_8945252
source EZB Free E-Journals
subjects Chemistry
Exact sciences and technology
General and physical chemistry
Photochemistry
Physical chemistry of induced reactions (with radiations, particles and ultrasonics)
title Reactive intermediates in the photochemistry of 4-diazo-2-pyrazolin-5-ones
url http://sfxeu10.hosted.exlibrisgroup.com/loughborough?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2025-02-05T21%3A24%3A56IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-pascalfrancis_nrcre&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.atitle=Reactive%20intermediates%20in%20the%20photochemistry%20of%204-diazo-2-pyrazolin-5-ones&rft.jtitle=Canadian%20journal%20of%20chemistry&rft.au=Umrigar,%20Pesi&rft.date=1984-11-01&rft.volume=62&rft.issue=11&rft.spage=2456&rft.epage=2463&rft.pages=2456-2463&rft.issn=0008-4042&rft.eissn=1480-3291&rft.coden=CJCHAG&rft_id=info:doi/10.1139/v84-423&rft_dat=%3Cpascalfrancis_nrcre%3E8945252%3C/pascalfrancis_nrcre%3E%3Cgrp_id%3Ecdi_FETCH-LOGICAL-c250t-f5d46ded48734f8ae9f3d93c98be809867c5f47c4d6a04ae1f5e70df168c9b53%3C/grp_id%3E%3Coa%3E%3C/oa%3E%3Curl%3E%3C/url%3E&rft_id=info:oai/&rft_id=info:pmid/&rfr_iscdi=true