QTAIM analysis of the bonding in anionic group 6 carbonyl selenide clusters: [SeM(CO)] (M=Cr, Mo, W).

Context: This research aims to offer a deeper understanding of the bonding interactions between M-Se and M-CO and how these interactions change across the group 6 transition metal series: [SeM(CO)] (M = Cr, Mo, W). It also seeks to explore the impact of carbonyl groups on M-M interactions within the clusters. Seven criteria, which are based on QTAIM properties, have been considered and compared with the corresponding criteria in other transition metal clusters.