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(Pyrazolylborato)zinc−Aldehyde Complexes
Author(s) -
Walz Rainer,
Ruf Michael,
Vahrenkamp Heinrich
Publication year - 2001
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(20011)2001:1<139::aid-ejic139>3.0.co;2-6
Subject(s) - aldehyde , chemistry , hydrate , deprotonation , zinc , chelation , hydroxide , polymer chemistry , tris , zinc hydroxide , medicinal chemistry , transition metal , organic chemistry , catalysis , ion , biochemistry
The zinc hydroxide complex Tp Cum,Me Zn−OH [ 1 , Tp Cum,Me = tris(3‐cumenyl‐5‐methylpyrazolyl)borate] reacts with trichloroacetaldehyde and pentafluorobenzaldehyde to form the complexes Tp Cum,Me Zn−O(CHOH)R, containing the aldehyde ligands as the deprotonated aldehyde hydrates. 1 and 2‐formylphenol, 2,6‐diformylphenol and 2‐formylthiophenol undergo condensation with the formation of the corresponding phenolate and thiophenolate complexes, in which one formyl group of each is coordinated to the zinc center as part of a six‐membered chelate ring. The aldehyde−hydrate and aldehyde−phenolate bonding modes, which were confirmed by three structure determinations, represent two new kinds of aldehyde attachment to transition metal centers.