Ni and Se is observed in the structure of the mixed selenide/selenolate cluster
[Ni 20 Se 12 (SeMe) 10 ]
2À (7, Figure 13.5) [29]. The cluster contains a Ni 20 Se 12 core that
is stabilized by surface Me groups bonded to Se centers. The interstitial selenide
ligands (Se
2À ) arise from SeaC bond scission reactions of the MeSe
À reagent.
13.3
Group XI Chalcogenides
The utility of silylated chalcogen reagents as a soluble delivery source of ‘‘E
2À ’’ has
developed into a powerful method for the generation of nanocluster materials.
Fig. 13.5. The NiaSe cluster cores in [Ni 34 Se 22 (PPh 3 ) 10 ] 6
(top) and [Ni 20 Se 12 (SeMe) 10 ]
2À 7 (bottom) [28, 29].
13.3 Group XI Chalcogenides 423