title: (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.
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).
authors.affiliation: Faculty of Chemistry, Nicholas Copernicus University, Gagarina 7, PL-87100 Toruń, Poland. leszekp@chem.umk.pl
authors.forename: Leszek
authors.initials: L
authors.lastname: Pazderski
authors.forename: Tomasz
authors.initials: T
authors.lastname: Pawlak
authors.forename: Jerzy
authors.initials: J
authors.lastname: Sitkowski
authors.forename: Lech
authors.initials: L
authors.lastname: Kozerski
authors.forename: Edward
authors.initials: E
authors.lastname: Szłyk
mesh_terms: D000465:Algorithms; D016477:Artifacts; D002247:Carbon Isotopes / Q000737:chemistry; D002412:Cations; D007501:Iron / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy / Q000379:methods*; D009587:Nitrogen Isotopes / Q000737:chemistry; D009992:Osmium / Q000737:chemistry*; D010618:Phenanthrolines / Q000737:chemistry*; D011522:Protons; D011725:Pyridines / Q000737:chemistry*; D012413:Rubidium / Q000737:chemistry*; D012680:Sensitivity and Specificity; D013223:Statistics as Topic
chemical_list: D002247:Carbon Isotopes; D002412:Cations; D009587:Nitrogen Isotopes; D010618:Phenanthrolines; D011522:Protons; D011725:Pyridines; D009992:Osmium; D007501:Iron; D012413:Rubidium; C023666:pyridine