First trigonal-antiprismatic tris-dichloroglyoximate iron(ii) clathrochelate and its reactivity in nucleophilic substitution reactions

Synthesis and structure of the first clathrochelate ligand with a cis-diimidazolyl donor fragment

“…The corresponding signal of diimidazolyl chelate fragment is observed at 139.0 ppm alongside with the peak of the carbon 2-C atom of imidazolyl substituent at 138.3 ppm (for assignment of these signals we used the APT experiment). The 11 Deconvolution of the solution UV-vis spectrum of the diimidazolyl complex 3 into Gaussian components resulted in the highly intense Fed ? Lp * charge transfer bands (CTBs) in the visible region with maxima at 389, 448, 468 and 489 nm (the latter CTB is the most intensive one with e $ 2 Â 10 4 L mol À1 cm À1 ) and the p-p * transition bands in the polyene clathrochelate ligand from 220 to 300 nm.…”

“…Such polynuclear compounds and polytopic complexes have proved to be the biomimetics of metalloenzymes active sites and other biological systems [3] and promising precursors in creating of molecular electronic and photonic devices [4][5][6][7][8][9][10][11]. On the other hand, imidazolyl-containing heme systems play an important role in biological oxygen and electron transport [12,13].…”

New o-carboranyl-containing capping agents for d-metal tris-dioximates and first bis-C-carboranylboron-capped iron(II) clathrochelates: Synthesis and X-ray structure

“…These compounds have been used widely as a ''molecular scaffold" for the design of polytopic, polyfunctional and polynuclear systems [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16]. In particular, the ribbed-functionalized clatrochelates both with the inherent and with the terminal closo-borate substituents synthesized recently have been proposed as new radiopharmaceuticals for boron neutron capture therapy of cancer [12,17].…”

Reactivity of iron(II) dichloride clathrochelate: Synthesis and properties of mono-and disubstituted amino clathrochelates

“…Chlorine containing trisdioximate iron(II) clathro chelates enter into substitution reactions with nucleo philic reagents of different nature to form from mono to hexafunctionalized clathrochelates in the case of hexa chloride precursors A-H, [1][2][3][4][5][6][7] whereas in the case of dichloride macrobicyclic precursor 1a 7-11 monoribbed functionalized mono (1b,c) and disubstituted (1d-g) iron(II) clathrochelates are formed.…”