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1H NMR assignment corrections and 1H, 13C, 15N NMR coordination shifts structural correlations in Fe(II), Ru(II) and Os(II) cationic complexes with 2,2′-bipyridine and 1,10-phenanthroline

✍ Scribed by Leszek Pazderski; Tomasz Pawlak; Jerzy Sitkowski; Lech Kozerski; Edward Szłyk

Publisher
John Wiley and Sons
Year
2010
Tongue
English
Weight
190 KB
Volume
48
Category
Article
ISSN
0749-1581

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✦ Synopsis

Abstract

^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.

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