title: Peeling the onion: a revised model of the electron count for matryoshka clusters.
abstract: We have provided a model for understanding two isoelectronic matryoshka clusters, [Sn@Cu12@Sn20](12-) and [As@Ni12@As20](3-). By dividing each of the clusters in a layer-by-layer manner and allowing each layer to follow a simple electron-filling rule, we can formulate a consistent model to explain experimental and computed properties of both matryoshka clusters that cannot be adequately explained by existing models. By analysing these clusters in a way analogous to peeling an onion, we can not only have an understanding of the structure and bonding of the two matryoshka clusters under study, but also have a generalizable model to handle certain p/d-block@d-block endohedral clusters.
authors: Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, People's Republic of China. chzlin@ust.hk.
authors: Fu Kit
authors: FK
authors: Sheong
authors: Wen-Jie
authors: WJ
authors: Chen
authors: Hwon
authors: H
authors: Kim
authors: Zhenyang
authors: Z
authors: Lin