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New Bis(mercaptoimidazolyl)(pyrazolyl)borate Ligands and Their Zinc Complex Chemistry
Author(s) -
Shu Mouhai,
Walz Rainer,
Wu Biao,
Seebacher Jan,
Vahrenkamp Heinrich
Publication year - 2003
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/ejic.200300079
Subject(s) - chemistry , zinc , cationic polymerization , medicinal chemistry , dehydrogenation , boron , imidazole , catalysis , bioinorganic chemistry , hydrolysis , coordination complex , inorganic chemistry , alcohol , potassium , substrate (aquarium) , stereochemistry , polymer chemistry , organic chemistry , metal , geology , oceanography
Nine new tripodal NS 2 ligands of the bis(mercaptoimidazolyl)(pyrazolyl)borate type with varying 3‐R‐mercaptoimidazolyl moieties were prepared as their potassium salts. Treatment with zinc salts yielded the complex types L·Zn−Cl, L·Zn−I, L·Zn−ONO 2 , L·Zn−OClO 3 and [L·Zn(imidazole)]ClO 4 . Attempts at the formation of L·Zn−OH or cationic L·Zn complexes resulted in dismutation and formation of ZnL 2 complexes. Hydrolytic destruction yielded one [OZn 4 (thiooimidazolate) 6 ] complex. The ZnS 2 NO coordination which is present in the enzyme‐substrate complex of alcohol dehydrogenase could be successfully modelled by an [L·Zn(C 2 H 5 OH)] + complex. The L·Zn−X complexes showed very low catalytic activity in the dehydrogenation of 2‐propanol or the hydrogenation of p ‐nitrobenzaldehyde. The new compounds were identified by a total of 12 structure determinations. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2003)
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