Severity: Warning
Message: file_get_contents(https://...@pubfacts.com&api_key=b8daa3ad693db53b1410957c26c9a51b4908&a=1): Failed to open stream: HTTP request failed! HTTP/1.1 429 Too Many Requests
Filename: helpers/my_audit_helper.php
Line Number: 176
Backtrace:
File: /var/www/html/application/helpers/my_audit_helper.php
Line: 176
Function: file_get_contents
File: /var/www/html/application/helpers/my_audit_helper.php
Line: 250
Function: simplexml_load_file_from_url
File: /var/www/html/application/helpers/my_audit_helper.php
Line: 3122
Function: getPubMedXML
File: /var/www/html/application/controllers/Detail.php
Line: 575
Function: pubMedSearch_Global
File: /var/www/html/application/controllers/Detail.php
Line: 489
Function: pubMedGetRelatedKeyword
File: /var/www/html/index.php
Line: 316
Function: require_once
In a nonaqueous solvent, alkyl nitrites can be easily achieved through the reaction of alkyl alcohols and gaseous NO. In the presence of air, the nitric oxide can in fact be oxidized to nitrous anhydride, which acts as a nitrosating agent. A quantitative study conducted on cycloalkyl alcohols has shown conversion yields to nitrites within the range 65-90%. This result has been validated by ESR spectroscopy experiments on several alkyl alcohols/NO mixtures, which lead to the detection of the same radical species detectable when a solution of the corresponding nitrites is photolyzed.
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Source |
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http://dx.doi.org/10.1021/jo982341p | DOI Listing |
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