Details

Autor(en) / Beteiligte

• Apblett, Allen W
• Warren, Alison C
• Barron, Andrew R

Titel

Tris-triphenylsiloxy compounds of aluminium

Ist Teil von

• Canadian journal of chemistry, 1992-03, Vol.70 (3), p.771-778

Ort / Verlag

Ottawa, Canada: NRC Research Press

Erscheinungsjahr

1992

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• The reaction of AlMe 3 with three equivalents of HOSiPh 3 in THF results in the formation of the solvent complex Al(OSiPh 3 ) 3 (THF) ( 1 ). Hydrolysis of 1 yields the stable water complex Al(OSiPh 3 ) 3 (H 2 O)(THF) 2 ( 2 ) in which the THF molecules are hydrogen bonded to the coordinated water ligand. Compounds 1 and 2 have been fully characterized by 1 H, 13 C, 17 O, 27 Al, and 29 Si NMR and IR spectroscopy. In addition, variable temperature 1 H NMR of 2 has been employed to investigate the steric interactions between the phenyl rings of adjacent siloxide ligands. The molecular structures of the solvates 1 *(THF) and 2 *(THF) 1.25 have been determined by X-ray crystallography. 1 *(THF): monoclinic P2 1 /c, a = 10.03 (1), b = 23.758 (6), c = 23.294 (7) Å, β = 101.13 (6)°, Z = 4, R = 0.084, R w  = 0.094. 2 *(THF) 1.25 : cubic , a = 23.034 (3) Å, Z = 4, R = 0.093, R w  = 0.099. Keywords: aluminium, siloxide, hydrolysis, complex, NMR spectroscopy.