Carbon Ligands
Organometallic compounds are not specifically discussed in this section. No carbonyl chemistry of scandium and yttrium has been reported yet and there is also no cyanide chemistry of these two elements although thiocyanato complexes of scandium Sc NCS 6 3 bonded through nitrogen are known. 8 The important developments involving scandium or yttrium with carbon have involved the fullerene derivatives of these elements. There have been some scandium carbide systems prepared but these will be...
Info Hpe
A useful compound for the preparation of organoscandium compounds is ,3-diketiminato scan-dium dichloride. This compound is prepared from the lithium salt of the aryl- -diketiminate and ScCl3 thf 3 the product retains a thf ligand and is five-coordinate in the solid state. 1H NMR shows that the compound is fluxional in solution.129 The chlorides are easily replaced and alkylation with organolithium compounds has been investigated. Reaction of bis-trimethylsilyl-methylscandium aryl-...
Halides
Complex halides of scandium and yttrium have been discussed in CCC 1987 . Most halides and halide complexes reported are of Sc111 and Y111 but there are some reduced halide species such as the diiodide.229 The hexafluoroscandium compounds NH4 3 ScF6 and Cu NH3 4 3 ScF6 have been prepared by the action of ammonium fluoride on scandium in a copper tube heated to 330 C or 400 C.230 The structure of solid ScCl3 has been refined from high-resolution powder neutron diffraction data. ScCl3 has a BiI3...
Me Me 1
The latter compound showed moderate activity as an ethylene polymerization catalyst. Azaborolinyl-Ti complexes have been reported, including TiBr2 5- But NB Me C3H3 . X-ray data revealed an interaction between B and Br.5 4.2.2.2 Silicon-based Ligand Complexes Isolable Ti-Si compounds that lack ancillary Cp-ligands are rare. The metathetical reaction of TiCl CH2R 3 R But, SiMe3 with Li Si SiMe3 3 afforded the crystallographically characterized complexes Ti Si SiMe3 3 CH2R 3.6,7 Ab initio...