I was trying to optimize Cd-Se-Cystein nano particle molecule using GassView 5.0 and Gaussian 09 W, but after 4th or 5th iteration in the optimization process it's getting fragmented in to different sub molecule. i'm new to this cud somebody shed light on this why is it happening? (is there any option to upload sample image or animation here for having more clarity ?)

thanks in advance
« Last edit by mmashalpk on Thu Feb 16, 2017 10:31 am. »