Synthesis, phys. properties and the coordination with two Ru(bpy)22+ complex fragments are described for 3,6-bis(2'-pyrimidyl)-1,2,4,5-tetrazine (bmtz), the 1st compact ligand which offers four equiv. a-diimine chelate sites. Spectroelectrochem. of intensely blue (μ-bmtz)Ru(bpy)22n+, n = 4, reveals a very facile redn. (n = 3) at -0.40 V vs. FeCp2+/0 and a metal oxidn. (n = 5) at +1.18 V to a diruthenium(II/III) mixed-valent form which exhibits an intervalence transfer absorption at 1490 nm. The corresponding complex (μ-H2bmtz)Ru(bpy)224+ with the 1,4-dihydro form H2bmtz of the tetrafunctional ligand is oxidized in two steps at 0.58 and 1.07 vs. FeCp2+/0. on SciFinder(R)
%0 Journal Article
%1 Kaim.1995b
%A Kaim, Wolfgang
%A Fees, Joerg.
%D 1995
%J Zeitschrift fuer Naturforschung, B: A Journal of Chemical Sciences
%K bispyrimidyl complex complex;spectroelectrochem complex;tetrazine dinuclear electrochem pyrimidyltetrazine ruthenium
%N 1
%P 123--127
%R 10.1515/znb-1995-0123
%T The new tetrafunctional p acceptor ligand 3,6-bis(2'-pyrimidyl)-1,2,4,5-tetrazine (bmtz): Diruthenium complexes of bmtz and its 1,4-dihydro form
%V 50
%X Synthesis, phys. properties and the coordination with two Ru(bpy)22+ complex fragments are described for 3,6-bis(2'-pyrimidyl)-1,2,4,5-tetrazine (bmtz), the 1st compact ligand which offers four equiv. a-diimine chelate sites. Spectroelectrochem. of intensely blue (μ-bmtz)Ru(bpy)22n+, n = 4, reveals a very facile redn. (n = 3) at -0.40 V vs. FeCp2+/0 and a metal oxidn. (n = 5) at +1.18 V to a diruthenium(II/III) mixed-valent form which exhibits an intervalence transfer absorption at 1490 nm. The corresponding complex (μ-H2bmtz)Ru(bpy)224+ with the 1,4-dihydro form H2bmtz of the tetrafunctional ligand is oxidized in two steps at 0.58 and 1.07 vs. FeCp2+/0. on SciFinder(R)
@article{Kaim.1995b,
abstract = {Synthesis, phys. properties and the coordination with two [Ru(bpy)2]2+ complex fragments are described for 3,6-bis(2'-pyrimidyl)-1,2,4,5-tetrazine (bmtz), the 1st compact ligand which offers four equiv. \textgreek{a}-diimine chelate sites. Spectroelectrochem. of intensely blue {(μ-bmtz)[Ru(bpy)2]2}n+, n = 4, reveals a very facile redn. (n = 3) at -0.40 V vs. FeCp2+/0 and a metal oxidn. (n = 5) at +1.18 V to a diruthenium(II/III) mixed-valent form which exhibits an intervalence transfer absorption at 1490 nm. The corresponding complex {(μ-H2bmtz)[Ru(bpy)2]2}4+ with the 1,4-dihydro form H2bmtz of the tetrafunctional ligand is oxidized in two steps at 0.58 and 1.07 vs. FeCp2+/0. [on SciFinder(R)]},
added-at = {2022-06-15T11:26:56.000+0200},
author = {Kaim, Wolfgang and Fees, Joerg.},
biburl = {https://puma.ub.uni-stuttgart.de/bibtex/236a615fad5ab6ab85f20832f18b79259/huebleriac},
doi = {10.1515/znb-1995-0123},
interhash = {349629ecbdb907b9d3529f2a876d8807},
intrahash = {36a615fad5ab6ab85f20832f18b79259},
issn = {0932-0776},
journal = {Zeitschrift fuer Naturforschung, B: A Journal of Chemical Sciences},
keywords = {bispyrimidyl complex complex;spectroelectrochem complex;tetrazine dinuclear electrochem pyrimidyltetrazine ruthenium},
number = 1,
pages = {123--127},
timestamp = {2022-06-15T09:26:56.000+0200},
title = {The new tetrafunctional \textgreek{p} acceptor ligand 3,6-bis(2'-pyrimidyl)-1,2,4,5-tetrazine (bmtz): Diruthenium complexes of bmtz and its 1,4-dihydro form},
volume = 50,
year = 1995
}
