Unsymmetric chiral salen Schiff bases: A new chiral ligand pool from bis-schiff bases containing two different salicylaldehyde units
摘要:
An efficient and facile synthesis of a new class of novel chiral Salen Schiff base ligands has been developed via a stepwise approach. An important feature of these new Salen ligands is that they possess two different salicylaldehyde units, therefore, while steric factor or electronic factor can be fixed on one side, electronic or/and steric factors can be tuned from the other side with different substituents. (C) 1998 Elsevier Science Ltd. All rights reserved.
Unsymmetric chiral salen Schiff bases: A new chiral ligand pool from bis-schiff bases containing two different salicylaldehyde units
摘要:
An efficient and facile synthesis of a new class of novel chiral Salen Schiff base ligands has been developed via a stepwise approach. An important feature of these new Salen ligands is that they possess two different salicylaldehyde units, therefore, while steric factor or electronic factor can be fixed on one side, electronic or/and steric factors can be tuned from the other side with different substituents. (C) 1998 Elsevier Science Ltd. All rights reserved.
A process for preventing the redeposition of migrant dyes in a washing liquor by adding to each liter of the washing liquor, which comprises a peroxide-containing detergent, from 0.5 to 150 mg of one or more asymmetric manganese complexes of the salen type.
Verfahren zur Verhinderung des Wiederaufziehens von migrierenden Farbstoffen in einer Waschflotte, indem man der Waschflotte, die ein peroxidhaltiges Waschmittel enthält, 0,5 bis 150 mg pro Liter Waschflotte einen oder mehrere unsymmetrische Mangankomplexe vom Salen-Typ zusetzt.
Novel unsymmetric chiral Schiff bases possessing two different donor moieties: unique tetradentate ligands from combination of salicylaldehyde and acetylacetone units
作者:Jose Lopez、Eric A. Mintz、Fu-Liang Hsu、Xiu R. Bu
DOI:10.1016/s0957-4166(98)00401-7
日期:1998.11
A new class of novel chiral Schiff base ligands has been developed using a stepwise approach. The key feature of these new ligands is that they possess two different donor units, one of them is aromatic while the other is non-aromatic. (C) 1998 Elsevier Science Ltd. All rights reserved.