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Synthesis and characterization of technetium(III) complexes with nitrogen heterocycles by O atom transfer from oxotechnetium(V) cores. Crystal structures of mer-(Cl sub 3 (pic) sub 3 Tc) and mer-(Cl sub 3 (pic)(PMe sub 2 Ph) sub 2 Tc) (pic = 4-picoline). Electrochemical parameters fore the reduction of Tc sup II , Tc sup III , and Tc sup IV

Journal Article · · Inorganic Chemistry; (USA)
DOI:https://doi.org/10.1021/ic00343a040· OSTI ID:6113237
; ;  [1]
  1. Boston College, Chestnut Hill, MA (USA)
+ Show Author Affiliations

The combination of pyridine ligands, (OCl{sub 4}Tc){sup {minus}}, and O atom acceptors of different cone angles, such as PMe{sub 2}Ph or PPh{sub 3}, results in Tc{sup III} complexes that vary in the coordination of the phosphine ligand. The compounds mer(Cl{sub 3}(4-picoline){sub 3}Tc) and mer-(Cl{sub 3}(4-picoline)(PMe{sub 2}Ph){sub 2}Tc) have been obtained in good yield and have been characterized spectroscopically and by single-crystal x-ray diffraction. The crystal structure data are reported. Linear correlations of technetium reduction potentials in DMF with electrochemical ligand additivity parameters (E{sub L}'s) have been obtained for the Tc{sup II,I}, Tc{sup III,II}, and Tc{sup IV,III} couples. The slope and intercept (S{sub M}, I{sub M}) pairs for each technetium oxidation-reduction couple, respectively, are (1.39, {minus}2.07), (1.29, {minus}0.91), and (1.00, 0.65). 32 refs., 3 figs., 6 tabs.

OSTI ID:
6113237
Journal Information:
Inorganic Chemistry; (USA), Journal Name: Inorganic Chemistry; (USA) Vol. 29:18; ISSN 0020-1669; ISSN INOCA
Country of Publication:
United States
Language:
English

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Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
400400 -- Electrochemistry
AZINES
CHEMICAL PREPARATION
CHEMISTRY
CHLORINE COMPOUNDS
COMPLEXES
CRYSTAL STRUCTURE
DATA
ELECTROCHEMISTRY
EXPERIMENTAL DATA
HALOGEN COMPOUNDS
HETEROCYCLIC COMPOUNDS
INFORMATION
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC PHOSPHORUS COMPOUNDS
OXYGEN COMPOUNDS
PICOLINES
PYRIDINES
SYNTHESIS
TECHNETIUM COMPLEXES
TRANSITION ELEMENT COMPLEXES