×

Error message

  • Warning: count(): Parameter must be an array or an object that implements Countable in color_glass_table() (line 366 of /home/customer/www/sonciniresearchgroup.com/public_html/sites/all/themes/color_glass/includes/bootstrap.inc).
  • Deprecated function: implode(): Passing glue string after array is deprecated. Swap the parameters in Drupal\gmap\GmapDefaults->__construct() (line 107 of /home/customer/www/sonciniresearchgroup.com/public_html/sites/all/modules/gmap/lib/Drupal/gmap/GmapDefaults.php).
  • Notice: Trying to access array offset on value of type int in element_children() (line 6609 of /home/customer/www/sonciniresearchgroup.com/public_html/includes/common.inc).
  • Notice: Trying to access array offset on value of type int in element_children() (line 6609 of /home/customer/www/sonciniresearchgroup.com/public_html/includes/common.inc).
  • Notice: Trying to access array offset on value of type int in element_children() (line 6609 of /home/customer/www/sonciniresearchgroup.com/public_html/includes/common.inc).
  • Notice: Trying to access array offset on value of type int in element_children() (line 6609 of /home/customer/www/sonciniresearchgroup.com/public_html/includes/common.inc).
  • Notice: Trying to access array offset on value of type int in element_children() (line 6609 of /home/customer/www/sonciniresearchgroup.com/public_html/includes/common.inc).
  • Notice: Trying to access array offset on value of type int in element_children() (line 6609 of /home/customer/www/sonciniresearchgroup.com/public_html/includes/common.inc).
  • Notice: Trying to access array offset on value of type int in element_children() (line 6609 of /home/customer/www/sonciniresearchgroup.com/public_html/includes/common.inc).
  • Notice: Trying to access array offset on value of type int in element_children() (line 6609 of /home/customer/www/sonciniresearchgroup.com/public_html/includes/common.inc).
  • Notice: Trying to access array offset on value of type int in element_children() (line 6609 of /home/customer/www/sonciniresearchgroup.com/public_html/includes/common.inc).
  • Notice: Trying to access array offset on value of type int in element_children() (line 6609 of /home/customer/www/sonciniresearchgroup.com/public_html/includes/common.inc).
  • Deprecated function: implode(): Passing glue string after array is deprecated. Swap the parameters in drupal_get_feeds() (line 394 of /home/customer/www/sonciniresearchgroup.com/public_html/includes/common.inc).
TitleDesign of annulene-within-an-annulene systems by the altanisation approach. A study of altan-[n]annulenes
Publication TypeJournal Article
Year of Publication2020
AuthorsPiccardo, M, Soncini, A, Fowler, PW, Monaco, G, Zanasi, R
JournalPHYSICAL CHEMISTRY CHEMICAL PHYSICS
Volume22
Pagination5476-5486
Date PublishedMAR 14
ISSN1463-9076
Abstract
The altanisation strategy, devised to design molecules with large and paratropic perimeter circulations, is applied to the family of [n]annulenes to give, altan-[n]annulenes, i.e. [n,5]coronenes. Analytical expressions are obtained for the eigenvalues of the Huckel Hamiltonian for altan-[n]annulenes, and used in conjunction with selection rules derived from the ipsocentric approach to predict patterns of global ring current in these systems. Density-functional calculations performed on seven altan-[n]annulenes, three neutral and four charged, give current-density maps in essential agreement with the predictions obtained at the unperturbed Huckel level. All but one of the systems show patterns with the tropicities expected for isolated annulenes, in line with the altanisation concept. The apparent exception is altan-[11]annulene(-), the only singlet system with a well defined open-shell character in the studied set. The key role of open-shell character can be accommodated by appropriate choice of the occupation numbers of the initial Huckel molecular orbitals, where the anion altan-[11]annulene(-) is considered as an [11]annulene inside the [22]annulene anion.
DOI10.1039/c9cp06835j
Library 
Soncini Group

Comments