CCL:G: Absorption spectrum of Tin atom involved molecule

From: "Sourabh Kumar" <sourabhkumar10021997#%#gmail.com>
Subject: CCL:G: Absorption spectrum of Tin atom involved molecule
Date: Wed, 1 Jul 2020 11:24:54 -0400

 Sent to CCL by: "Sourabh  Kumar" [sourabhkumar10021997 .. gmail.com]
 Hi everyone,
 I am trying to do absorption spectrum calculations of a Tin atom
 involved molecule(containing S, C, O and hydrogen atoms too) with the
 level of a theory of PBE/LANL2DZ ECP Gen. But the spectra it is
 producing is of very less oscillator strength. I have also tried many
 other methods like B3LYP, B97, BLYP, BHHLYP, wB97, wB97M with user-
 defined basis sets from basissetexchange.com but still, the oscillator
 strength is very week.
 I have used Qchem, orca and also Gaussian but from all, I am getting
 very weak oscillator strength.
 Could anyone please suggest what should I do here to solve this
 problem.
 Sourabh Kumar
 sourabhkumar10021997]_[gmail.com
 University of Bremen