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NMR Studies of Paramagnetic Metallocarbaporphyrinoids
Author(s) -
PacholskaDudziak Ewa,
LatosGrażyński Lechosław
Publication year - 2007
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.200700078
Subject(s) - chemistry , paramagnetism , nickel , intramolecular force , organometallic chemistry , coordination complex , reactivity (psychology) , nuclear magnetic resonance spectroscopy , group 2 organometallic chemistry , metal , molecule , reagent , crystallography , stereochemistry , organic chemistry , crystal structure , medicine , physics , alternative medicine , pathology , quantum mechanics
Carbaporphyrinoids provide a suitable macrocyclic platform for organometallic investigations that provide unique opportunities for modifying a macrocyclic structure. Alteration of a coordination core is a route of choice for stabilizing unusual metal ion oxidation states and coordination geometries. This microreview presents the general characteristic of paramagnetic metallocarbaporphyrinoids, with a focus on NMR studies. NMR spectroscopy of paramagnetic molecules can be considered as a powerful probe of several intriguing aspects of the molecular and electronic structures, structural rearrangements, and reactivity, including oxidation and oxygenation, of this fascinating class of compounds. The chosen examples address paramagnetic organometallic nickel(II) and nickel(III) complexes of N ‐confused porphyrins, the reactions of nickel(II) dimethylated N ‐confused porphyrins with organometallic reagents, the stabilization of rare organocopper(II) species, the investigation of weak intramolecular metal–arene interactions, and the conformational flexibility of nickel(II) benziporphyrin and vacataporphyrin. Particular emphasis is placed on NMR studies as an efficient way of detecting intermediate species formed in the course of oxidation and oxygenation of iron( n ) carbaporphyrinoids. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)