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1 H NMR assignment corrections and 1 H, 13 C, 15 N NMR coordination shifts structural correlations in Fe(II), Ru(II) and Os(II) cationic complexes with 2,2′‐bipyridine and 1,10‐phenanthroline
Author(s) -
Pazderski Leszek,
Pawlak Tomasz,
Sitkowski Jerzy,
Kozerski Lech,
Szłyk Edward
Publication year - 2010
Publication title -
magnetic resonance in chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.483
H-Index - 72
eISSN - 1097-458X
pISSN - 0749-1581
DOI - 10.1002/mrc.2600
Subject(s) - chemistry , ruthenium , osmium , cationic polymerization , crystallography , chelation , metal , nuclear magnetic resonance spectroscopy , stereochemistry , medicinal chemistry , inorganic chemistry , catalysis , polymer chemistry , organic chemistry , biochemistry
1 H, 13 C and 15 N NMR studies of iron(II), ruthenium(II) and osmium(II) tris‐chelated cationic complexes with 2,2′‐bipyridine and 1,10‐phenanthroline of the general formula [M(LL) 3 ] 2+ (M = Fe, Ru, Os; LL = bpy, phen) were performed. Inconsistent literature 1 H signal assignments were corrected. Significant shielding of nitrogen‐adjacent protons [H(6) in bpy, H(2) in phen] and metal‐bonded nitrogens was observed, being enhanced in the series Ru(II) → Os(II) → Fe(II) for 1 H, Fe(II) → Ru(II) → Os(II) for 15 N and bpy → phen for both nuclei. The carbons are deshielded, the effect increasing in the order Ru(II) → Os(II) → Fe(II). Copyright © 2010 John Wiley & Sons, Ltd.