摘要:
The template condensation of three methylchloroglyoximate molecules with phenylboronic acid and with (BF3O)-O-.(C2H5)(2) on an iron(II) ion afforded reactive trichloride phenylboron- and fluoroboron-capped precursors, respectively. The monochloride FeBd(2)(CH(3)ClGm)(BF)(2) precursor (where Bd(2-) and CH(3)ClGm(2-) are alpha-benzyldioxime and methylchloroglyoxime dianions) was synthesized by condensation of macrocyclic iron(II) alpha-benzyldioximate FeBd(2)(BF2)(2)(CH3CN)(2) with CH(3)ClGmH(2). Mono- and trifunctionalized amine, alkylsulfide, and arylsulfide clathrochelate iron(II) tris-dioximates were prepared starting from these precursors by nucleophilic substitution reactions. The complexes obtained were characterized using elemental analysis, PD mass, IR, UV-Vis, H-1, C-13 NMR, and Fe-57 Mossbauer spectra, and X-ray crystallography. An encapsulated low-spin iron(II) ion was found to have distorted trigonal-prismatic coordination N-6-environment in all clathrochelates synthesized. (C) 2004 Elsevier B.V. All rights reserved.