1H-detected indirect NMR techniques were used to det. 15N and 195Pt NMR parameters for organoplatinum(IV) complexes and one Pt(II) complex contg. N-based azobispyridine, bispyridyltetrazine, and bipyrimidine ligands. The inverse technique permitted the detection of small 4J(Pt,H) and 5J(Pt,H) long-range couplings and the acquisition of 15N NMR data in natural isotopic abundance via nJ(N,H) intra- and inter-ligand couplings, but failed in cases where coherence transfer is quenched by rapid relaxation of the metal atom. In one case, anal. of satellite patterns in a set of 2H,15N, 1H,195Pt and 1H,13C correlation spectra allowed a pos. sign to be detd. for 1J(Pt,15N). Qual. arguments are presented to explain the obsd. 15N coordination shifts in complexes with different azine ligands in terms of azine-M dative bond formation and LnM-azine back-donation. [on SciFinder(R)]
%0 Journal Article
%1 Gudat.2004
%A Gudat, Dietrich
%A Dogan, Akbey
%A Kaim, Wolfgang
%A Klein, Axel.
%D 2004
%J Magnetic Resonance in Chemistry
%K NMR azine chelating complex ligand multifunctional multinuclear organoplatinum
%N 9
%P 781--787
%R 10.1002/mrc.1407
%T Multinuclear NMR study of some organoplatinum complexes containing multifunctional azines as chelating ligands
%V 42
%X 1H-detected indirect NMR techniques were used to det. 15N and 195Pt NMR parameters for organoplatinum(IV) complexes and one Pt(II) complex contg. N-based azobispyridine, bispyridyltetrazine, and bipyrimidine ligands. The inverse technique permitted the detection of small 4J(Pt,H) and 5J(Pt,H) long-range couplings and the acquisition of 15N NMR data in natural isotopic abundance via nJ(N,H) intra- and inter-ligand couplings, but failed in cases where coherence transfer is quenched by rapid relaxation of the metal atom. In one case, anal. of satellite patterns in a set of 2H,15N, 1H,195Pt and 1H,13C correlation spectra allowed a pos. sign to be detd. for 1J(Pt,15N). Qual. arguments are presented to explain the obsd. 15N coordination shifts in complexes with different azine ligands in terms of azine-M dative bond formation and LnM-azine back-donation. [on SciFinder(R)]
@article{Gudat.2004,
abstract = {1H-detected indirect NMR techniques were used to det. 15N and 195Pt NMR parameters for organoplatinum(IV) complexes and one Pt(II) complex contg. N-based azobispyridine, bispyridyltetrazine, and bipyrimidine ligands. The inverse technique permitted the detection of small 4J(Pt,H) and 5J(Pt,H) long-range couplings and the acquisition of 15N NMR data in natural isotopic abundance via nJ(N,H) intra- and inter-ligand couplings, but failed in cases where coherence transfer is quenched by rapid relaxation of the metal atom. In one case, anal. of satellite patterns in a set of 2H,15N, 1H,195Pt and 1H,13C correlation spectra allowed a pos. sign to be detd. for 1J(Pt,15N). Qual. arguments are presented to explain the obsd. 15N coordination shifts in complexes with different azine ligands in terms of azine-M dative bond formation and LnM-azine back-donation. [on SciFinder(R)]},
added-at = {2022-06-15T11:26:56.000+0200},
author = {Gudat, Dietrich and Dogan, Akbey and Kaim, Wolfgang and Klein, Axel.},
biburl = {https://puma.ub.uni-stuttgart.de/bibtex/23a405b21faf18bc68f194758f73260ad/huebleriac},
doi = {10.1002/mrc.1407},
interhash = {011913a433c16bbac29f866db2a7aa9b},
intrahash = {3a405b21faf18bc68f194758f73260ad},
issn = {0749-1581},
journal = {Magnetic Resonance in Chemistry},
keywords = {NMR azine chelating complex ligand multifunctional multinuclear organoplatinum},
number = 9,
pages = {781--787},
timestamp = {2022-06-15T09:26:56.000+0200},
title = {Multinuclear NMR study of some organoplatinum complexes containing multifunctional azines as chelating ligands},
volume = 42,
year = 2004
}
