From owner-chemistry@ccl.net Mon Jul 15 09:02:00 2024
From: "Pierre Archirel pierre.archirel() universite-paris-saclay.fr" <owner-chemistry_+_server.ccl.net>
To: CCL
Subject: CCL: 2 electron excitations
Message-Id: <-55197-240715082724-15142-/etSC9PR/vvrwbn3PkyBrw_+_server.ccl.net>
X-Original-From: "Pierre  Archirel" <pierre.archirel-x-universite-paris-saclay.fr>
Date: Mon, 15 Jul 2024 08:27:17 -0400


Sent to CCL by: "Pierre  Archirel" [pierre.archirel=universite-paris-saclay.fr]
Dear colleagues,
I have the evidence of poor TDDFT results on the cation of some conjugated molecule. 
One possibility is that single excitations are not sufficient, and that two electron excitations interfere.
Could you give me references about this issue?
Many thanks in advance,
Pierre Archirel
ICP
Universite Paris-Saclay
France