Mononuclear Ru complexes of tetrazine derived L, RuII(acac)2(L) (1), [RuII(bpy)2(L)](ClO4)2 (2) and [RuII(bpy)(L)2](ClO4)2 (3) (L = 3-amino-6-(3,5-dimethylpyrazol-1-yl)-1,2,4,5-tetrazine) were prepd. The free L exists as a dimeric entity in the solid state via H bonding interactions involving L and H2O mols. present in the crystal lattice. 1 Exhibits unusually strong bonds from RuII to coordinating pyrazolyl-N (2.040(2) \AA) and esp. to tetrazine-N (1.913(2) \AA). The RuIII/RuII couples of 1-3 appeared at 0.28, 1.34 and 1.50 V vs. SCE, resp. The tetrazine and bpy-based redns. were obsd. at -1.33 (1); -0.55 and -1.55/-1.75/-1.98 (2); -0.47/-0.78 and -1.80/-2.02 V (3), resp. 1, 2 And 3 displayed two MLCT bands each, corresponding to dp(RuII) $\rightarrow$ p* (L, tetrazine) and dp(RuII) $\rightarrow$ p* (acac or bpy or L) transitions. 1+ And 2+ showed rhombic EPR spectra at 110 and 4 K, resp. and 1-, 2- and 3- exhibited multiple line EPR spectra at 300 K 1-3 exhibited moderately strong emission spectra in EtOH-MeOH glass at 77 K. [on SciFinder(R)]
%0 Journal Article
%1 Nayak.2005
%A Nayak, Animesh
%A Patra, Srikanta
%A Sarkar, Biprajit
%A Ghumaan, Sandeep
%A Puranik, Vedavati G.
%A Kaim, Wolfgang
%A Lahiri, Goutam Kumar.
%D 2005
%J Polyhedron
%K acetylacetonate aminopyrazolyltetrazine bipyridine charge complex complex;crystal complex;electrochem complex;ruthenium luminescence redox ruthenium spectrum structure transfer
%N 2
%P 333--342
%R 10.1016/j.poly.2004.11.019
%T Tetrazine derived mononuclear RuII(acac)2(L) (1), [RuII(bpy)2(L)](ClO4)2 (2) and [RuII(bpy)(L)2](ClO4)2 (3) (L = 3-amino-6-(3,5-dimethylpyrazol-1-yl)-1,2,4,5-tetrazine, acac = acetylacetonate, bpy = 2,2'-bipyridine): Syntheses, structures, spectra and redox properties
%V 24
%X Mononuclear Ru complexes of tetrazine derived L, RuII(acac)2(L) (1), [RuII(bpy)2(L)](ClO4)2 (2) and [RuII(bpy)(L)2](ClO4)2 (3) (L = 3-amino-6-(3,5-dimethylpyrazol-1-yl)-1,2,4,5-tetrazine) were prepd. The free L exists as a dimeric entity in the solid state via H bonding interactions involving L and H2O mols. present in the crystal lattice. 1 Exhibits unusually strong bonds from RuII to coordinating pyrazolyl-N (2.040(2) \AA) and esp. to tetrazine-N (1.913(2) \AA). The RuIII/RuII couples of 1-3 appeared at 0.28, 1.34 and 1.50 V vs. SCE, resp. The tetrazine and bpy-based redns. were obsd. at -1.33 (1); -0.55 and -1.55/-1.75/-1.98 (2); -0.47/-0.78 and -1.80/-2.02 V (3), resp. 1, 2 And 3 displayed two MLCT bands each, corresponding to dp(RuII) $\rightarrow$ p* (L, tetrazine) and dp(RuII) $\rightarrow$ p* (acac or bpy or L) transitions. 1+ And 2+ showed rhombic EPR spectra at 110 and 4 K, resp. and 1-, 2- and 3- exhibited multiple line EPR spectra at 300 K 1-3 exhibited moderately strong emission spectra in EtOH-MeOH glass at 77 K. [on SciFinder(R)]
@article{Nayak.2005,
abstract = {Mononuclear Ru complexes of tetrazine derived L, RuII(acac)2(L) (1), [RuII(bpy)2(L)](ClO4)2 (2) and [RuII(bpy)(L)2](ClO4)2 (3) (L = 3-amino-6-(3,5-dimethylpyrazol-1-yl)-1,2,4,5-tetrazine) were prepd. The free L exists as a dimeric entity in the solid state via H bonding interactions involving L and H2O mols. present in the crystal lattice. 1 Exhibits unusually strong bonds from RuII to coordinating pyrazolyl-N (2.040(2) {\AA}) and esp. to tetrazine-N (1.913(2) {\AA}). The RuIII/RuII couples of 1-3 appeared at 0.28, 1.34 and 1.50 V vs. SCE, resp. The tetrazine and bpy-based redns. were obsd. at -1.33 (1); -0.55 and -1.55/-1.75/-1.98 (2); -0.47/-0.78 and -1.80/-2.02 V (3), resp. 1, 2 And 3 displayed two MLCT bands each, corresponding to d\textgreek{p}(RuII) $\rightarrow$ \textgreek{p}* (L, tetrazine) and d\textgreek{p}(RuII) $\rightarrow$ \textgreek{p}* (acac or bpy or L) transitions. 1+ And 2+ showed rhombic EPR spectra at 110 and 4 K, resp. and 1-, 2- and 3- exhibited multiple line EPR spectra at 300 K 1-3 exhibited moderately strong emission spectra in EtOH-MeOH glass at 77 K. [on SciFinder(R)]},
added-at = {2018-08-09T10:59:25.000+0200},
author = {Nayak, Animesh and Patra, Srikanta and Sarkar, Biprajit and Ghumaan, Sandeep and Puranik, Vedavati G. and Kaim, Wolfgang and Lahiri, Goutam Kumar.},
biburl = {https://puma.ub.uni-stuttgart.de/bibtex/272b77cf99c4c7f1c1f508b14a9430936/galaktoze},
doi = {10.1016/j.poly.2004.11.019},
interhash = {55adfecf932ba6ae8707092fd72a1680},
intrahash = {72b77cf99c4c7f1c1f508b14a9430936},
issn = {0277-5387},
journal = {Polyhedron},
keywords = {acetylacetonate aminopyrazolyltetrazine bipyridine charge complex complex;crystal complex;electrochem complex;ruthenium luminescence redox ruthenium spectrum structure transfer},
number = 2,
pages = {333--342},
timestamp = {2018-08-09T13:02:07.000+0200},
title = {Tetrazine derived mononuclear RuII(acac)2(L) (1), [RuII(bpy)2(L)](ClO4)2 (2) and [RuII(bpy)(L)2](ClO4)2 (3) (L = 3-amino-6-(3,5-dimethylpyrazol-1-yl)-1,2,4,5-tetrazine, acac = acetylacetonate, bpy = 2,2'-bipyridine): Syntheses, structures, spectra and redox properties},
volume = 24,
year = 2005
}
