A PHP Error was encountered

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: 1034
Function: getPubMedXML

File: /var/www/html/application/helpers/my_audit_helper.php
Line: 3152
Function: GetPubMedArticleOutput_2016

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

A tropylium annulated N-heterocyclic carbene. | LitMetric

A tropylium annulated N-heterocyclic carbene.

Chem Commun (Camb)

Institut für Anorganische Chemie, Heinrich-Heine-Universität Düsseldorf, 40225 Düsseldorf, Germany.

Published: August 2020

AI Article Synopsis

  • Derivatives of the cationic compound ITrop are created through hydride abstraction from cycloheptatriene-related compounds.
  • ITrop, a cationic version of benzimidazolylidenes, shows a significantly reduced ability to donate σ-electrons while having a strong capacity to accept π-electrons.
  • Various spectroscopic, structural, and theoretical analyses support these findings about ITrop's electronic properties.

Article Abstract

Derivatives of the cationic tropylium annulated imidazolylidene ITrop are obtained by hydride abstraction from related cycloheptatriene compounds. Spectroscopic, structural and theoretical data indicate that, as a cationic relative of benzimidazolylidenes, ITrop has highly reduced σ-donor and strong π-acceptor character.

Download full-text PDF

Source
http://dx.doi.org/10.1039/d0cc04482bDOI Listing

Publication Analysis

Top Keywords

tropylium annulated
8
annulated n-heterocyclic
4
n-heterocyclic carbene
4
carbene derivatives
4
derivatives cationic
4
cationic tropylium
4
annulated imidazolylidene
4
imidazolylidene itrop
4
itrop hydride
4
hydride abstraction
4

Similar Publications

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!