Silylamides scandium

The range of transition metal silylamides was also expanded to include the synthesis and structure of the yttrium species [Y N(SiMe3)2 3],2 which, like its previously reported scandium counterpart, has a pyramidal MN3 array. In the vapor phase, the... 

Synthetic strategies to alkoxide complexes have been covered in full by previous reviews [14]. The silylamide route proved to be an advantageous method of preparation, especially in the case of homoleptic derivatives [15]. The group (IIIA) elements - scandium, yttrium and lanthanum - are considered as lanthanides on the basis of their general chemical similarity to the true lanthanides. 

Few scandium alkoxides have been studied in detail, but monomeric 3-coordination exists in [(2,6-Bu2-4-MeC6H20)3Sc] where the bulky ligand enforces steric crowding. It will, however, expand its coordination sphere to form 4-coordinate adducts with PhsPO and THF - unlike the corresponding three-coordinate silylamide. Sc(OSiBu3)3.L (L = THF,... 

Scandium resembles the other 3d transition metals from titanium through cobalt in forming an unusual three-coordinate silylamide, Sc[N(SiMe3)2]s, but unlike them its solid-state stmcture is pyramidal, not planar, in which respect it resembles the lanthanides and uranium. It does not form adducts with Lewis bases, presumably on steric... 

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