882071-01-4

Upstream product

• 103595-81-9 N,N′-bis(3,5-di-t-butylsalicylidene)-ethylenediamine 
• 882070-98-6 [N,N'-bis(3,5-di-tert-butylsalicylidene)ethylenediamino][bis(dimethylsilyl)amido]scandium(III) 
• 93547-88-7 t-butyl diphenylsilanol 

Relevant academic research and scientific papers

Synthesis and structural characterization of scandium SALEN complexes

A series of heteroleptic scandium SALEN complexes, [(SALEN)Sc(-Cl)] 2 and (SALEN)Sc[N(SiHMe2)2] is obtained via amine elimination reactions using [Sc(NiPr2) 2(-Cl)(THF)]2 and Sc[N(SiHMe2) 2]3(THF) as metal precursors, respectively. H 2SALEN ligand precursors comprising H2Salen [(1,2-ethandiyl)bis(nitrilomethylidyne)bis(2,4-di-tert-butyl)phenol], H 2Salpren [(2,2-dimethylpropanediyl)bis(nitrilomethylidyne)bis(2,4-di- tert-butyl)phenol], H2Salcyc [(1R,2R)-(-)-1,2-cyclohexanediyl) bis(nitrilomethylidyne)bis(2,4-di-tert-butyl)phenol] and H2Salphen [((1S,2S)-(-)-1,2-diphenylethandiyl)bis(nitrilomethylidyne)bis(2, 4-di-tert-butyl)phenol] are selected according to solubility and ligand backbone variation ("N-(R)-N" bite angle) criteria. Consideration is given to the feasibility of [Cl → NR2] and [N(SiHMe2) 2 → OSiR3] secondary ligand exchange reactions. X-ray crystal structure analyses of donor-free (Salpren)Sc(NiPr 2), (R,R)-(Salcyc)Sc[N(SiHMe2)2], (Salen)Sc(OSitBuPh2) and (Salphen)Sc(OSiH tBu2) reveal (i) a very short Sc-N bond distance of 2.000(3), (ii) weak β(Si-H)amido-Sc agostic interactions and (iii) an exclusive intramolecularly tetradentate and intrinsically bent coordination mode of the SALEN ligands with ∠(Ph,Ph) dihedral angles and Sc-[N2O2] distances in the 124.27(9)-127.7(3)° and 0.638(1)-0.688(1) range, respectively. The Royal Society of Chemistry 2006.