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Enantiopure Salen‐Type Zinc Complexes
Author(s) -
Meyer Nils,
Roesky Peter W.
Publication year - 2007
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.200700188
Subject(s) - zinc , enantiopure drug , salicylaldehyde , chemistry , monomer , dimer , medicinal chemistry , molecule , stereochemistry , ligand (biochemistry) , enantiomer , ether , polymer chemistry , crystallography , schiff base , enantioselective synthesis , organic chemistry , polymer , catalysis , biochemistry , receptor
The first structurally characterized salen complexes of zinc having the chiral 1,2‐( R , R )‐diamino‐1,2‐diphenylethane as bridge between the two salicylaldehyde units were prepared. Treatment of ( R,R )‐bis(salicylidene)‐1,2‐diphenylethylenediamine ( 1 ) with ZnEt 2 resulted in the enantiomeric pure salen zinc complex ‐di[( R,R )‐( N,N′ )‐bis(salicylidene)‐1,2‐diphenylethylenediamino)zinc(II)] ( 2 ). Compound 2 is a dimer in the solid state having a Zn‐O‐Zn‐O plane in the center of the molecule. In contrast, reaction of the more bulky ( R,R )‐bis(3,5‐di‐ tert ‐butylsalicylidene)‐1,2‐diphenylethylenediamine ( 3 ) with ZnMe 2 leads to the monomeric compound [( R,R )‐( N,N′ ‐bis(3,5‐di‐ tert ‐butylsalicylidene)‐1,2‐diphenylethylenediamino)(dietylether)zinc(II)] ( 4 ). In addition to the salen ligand one molecule of diethyl ether is bound resulting in a penta‐fold coordinated zinc atom.