From monomers to solids: controlled hydrolysis to form novel, heteroleptic hydroxide-containing complexes.
Four novel alkaline earth metal tetranuclear aryloxide/pyrazolate hydroxides of the general formula M4(ligand)6(OH)2(donor)n have been prepared by either adding stoichiometric quantities of water to preformed alkaline earth metal aryloxides or in a direct metalation regime combining metal, ligand (alcohol, pyrazole), and donor with stoichiometric amounts of water. The compounds are considered as potential intermediates in the sol-gel process. A nonhydrolyzable magnesium aryloxide has also been obtained using the same reaction scheme. Unexpectedly, a dimeric strontium complex with further association of a second dimer via hydrogen bonding from the solvent of crystallization, ethylenediamine, has been isolated by the treatment of strontium metal with a mixture of alcohol and water. All compounds were characterized using X-ray crystallography, 1H and 13C NMR, and IR spectroscopy.
Teng
Weijie
W
Department of Chemistry and the W. M. Keck Center for Molecular Electronics, Room 1-014, Center for Science and Technology, Syracuse University, Syracuse, New York 13244-4100, USA.
Guino-O
Marites
M
Hitzbleck
Julia
J
Englich
Ulrich
U
Ruhlandt-Senge
Karin
K