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Technetium(V) Nitrido Complexes with Tetra-azamacrocycles: Monocationic and Neutral Octahedral Complexes containing the N>2+ Core. Crystal Structure of 1)(H2O)>*2H2O (H2L = 1,4,8,11-tetra-azacyclotetradecane-5,7-dione)

DOI: 10.1039/DT9900001935

Source and publish data:

Journal of the Chemical Society, Dalton Transactions p. 1935 - 1940 (1990)

Update date:2022-08-03

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Authors:

Marchi, AndreaMarchi, Andrea

Rossi, RobertoRossi, Roberto

Magon, LucianoMagon, Luciano

Duatti, AdrianoDuatti, Adriano

Casellato, UmbertoCasellato, Umberto

et al.et al.

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Article abstract of DOI:10.1039/DT9900001935

Neutral and monocationic complexes of technetium(V) containing the N>2+ core have been synthesized by substitution reactions of with tetra-azamacrocycles.The ligand 1,4,8,11-tetra-azacyclotetradecane-5-one has also been prepared.The complexes have been characterized by elemental analysis, i.r. and 1H n.m.r. spectra, conductivity, and magnetic susceptibility measurements.The complex 1)(H2O)>*2H2O (H2L1 = 1,4,8,11-tetra-azacyclotetradecane-5,7-dione) has a distorted octahedral structure with a H2O molecule in trans position to the Tc<*>N group.The quadridentate dianionic ligand forms with the Tc atom two trans five-membered and two trans six-membered metallacycles in which the Tc-N (sp2) bond distances are significantly shorter than the corresponding Tc-N (sp3) distances (2.051 vs. 2.127 Angstroem).

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