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Salicylaldimine Dizinc Complexes: Activation of Water Molecules and Fixation of CO 2 in the Coordination Sphere of Zinc
Author(s) -
Döring Manfred,
Ciesielski Michael,
Walter Olaf,
Görls Helmar
Publication year - 2002
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/1099-0682(200207)2002:7<1615::aid-ejic1615>3.0.co;2-f
Subject(s) - chemistry , deprotonation , zinc , coordination sphere , carbonate , molecule , ligand (biochemistry) , hydroxide , carbon fixation , coordination complex , inorganic chemistry , bridging ligand , stereochemistry , crystallography , ion , organic chemistry , metal , carbon dioxide , biochemistry , receptor
Bi‐ and tetranuclear zinc complexes of the tridentate N,N,O ligand [{[2‐(2‐pyridyl)ethyl]imino}methyl]phenol (HL) and their enzyme‐like reactions are described. The coordinated water molecules in a dizinc complex of this ligand can be deprotonated reversibly similar to those in the resting states of zinc enzymes. The resulting tetranuclear complex bearing bridging hydroxide ions allows the reversible uptake of CO 2 . Whereas the coordination of hydrogen carbonate has not been observed, a tetranuclear carbonate complex with a unique structure was isolated. Its carbonate ion is coordinated to all four zinc atoms. The X‐ray structures of the reported complexes are discussed. (© Wiley‐VCH Verlag GmbH, 69451 Weinheim, Germany, 2002)