Edge-sharing of two five-membered metal chelate rings; structures and magnetism of molybdenum(0)-, copper(I)-, and cobalt(II)-complexes with the S-frame ligand azo-2,2'-pyridine
(Apy)Cu(PPh3)22BF42 (I; apy = azo-2,2'-pyridine) and (apy)Co(hfacac)2 (II; Hhfacac = hexafluoroacetylacetone) were prepd. from Cu(PPh3)4BF4 or Cu(hfacac)2, resp., and apy. The crystal structures of I and (apy)Mo(CO)4 (III) were detd. I and III are monoclinic, space groups P21/c and C2/c, Z = 4, R = 0.042 and 0.078, resp. Edge-sharing of 2 a-iminoazo 5-membered chelate rings in dinuclear complexes of the S-frame ligand apy give rise to short distances between coplanar mol.-bridged metal centers. An intramol. Cu-Cu distance of 493.7 pm was found for (μ,η4-apy)Cu(PPh3)222+ in the crystal with BF4- anions. Despite such relatively short metal-metal distances II does not exhibit unusual magnetic coupling between the high-spin d7 centers. III contains a not completely coplanar apy ligand; the free pyridyl group is rotated in such a fashion as to minimize steric repulsion and possibly coordinate weakly to the metal. on SciFinder(R)
%0 Journal Article
%1 Kaim.1991
%A Kaim, W.
%A Kohlmann, S.
%A Jordanov, J.
%A Fenske, D.
%D 1991
%J Zeitschrift fuer Anorganische und Allgemeine Chemie
%K azopyridine cobalt complex complex;transition copper magnetic metal molybdenum prepn property;crystal structure
%P 217--234
%T Edge-sharing of two five-membered metal chelate rings; structures and magnetism of molybdenum(0)-, copper(I)-, and cobalt(II)-complexes with the S-frame ligand azo-2,2'-pyridine
%V 598-599
%X (Apy)Cu(PPh3)22BF42 (I; apy = azo-2,2'-pyridine) and (apy)Co(hfacac)2 (II; Hhfacac = hexafluoroacetylacetone) were prepd. from Cu(PPh3)4BF4 or Cu(hfacac)2, resp., and apy. The crystal structures of I and (apy)Mo(CO)4 (III) were detd. I and III are monoclinic, space groups P21/c and C2/c, Z = 4, R = 0.042 and 0.078, resp. Edge-sharing of 2 a-iminoazo 5-membered chelate rings in dinuclear complexes of the S-frame ligand apy give rise to short distances between coplanar mol.-bridged metal centers. An intramol. Cu-Cu distance of 493.7 pm was found for (μ,η4-apy)Cu(PPh3)222+ in the crystal with BF4- anions. Despite such relatively short metal-metal distances II does not exhibit unusual magnetic coupling between the high-spin d7 centers. III contains a not completely coplanar apy ligand; the free pyridyl group is rotated in such a fashion as to minimize steric repulsion and possibly coordinate weakly to the metal. on SciFinder(R)
@article{Kaim.1991,
abstract = {{(Apy)[Cu(PPh3)2]2}[BF4]2 (I; apy = azo-2,2'-pyridine) and (apy)[Co(hfacac)]2 (II; Hhfacac = hexafluoroacetylacetone) were prepd. from [Cu(PPh3)4]BF4 or Cu(hfacac)2, resp., and apy. The crystal structures of I and (apy)Mo(CO)4 (III) were detd. I and III are monoclinic, space groups P21/c and C2/c, Z = 4, R = 0.042 and 0.078, resp. Edge-sharing of 2 \textgreek{a}-iminoazo 5-membered chelate rings in dinuclear complexes of the S-frame ligand apy give rise to short distances between coplanar mol.-bridged metal centers. An intramol. Cu-Cu distance of 493.7 pm was found for {(μ,η4-apy)[Cu(PPh3)2]2}2+ in the crystal with BF4- anions. Despite such relatively short metal-metal distances II does not exhibit unusual magnetic coupling between the high-spin d7 centers. III contains a not completely coplanar apy ligand; the free pyridyl group is rotated in such a fashion as to minimize steric repulsion and possibly coordinate weakly to the metal. [on SciFinder(R)]},
added-at = {2022-06-15T11:26:56.000+0200},
author = {Kaim, W. and Kohlmann, S. and Jordanov, J. and Fenske, D.},
biburl = {https://puma.ub.uni-stuttgart.de/bibtex/2cf762d23c36c780b787b5fca7d260771/huebleriac},
interhash = {f99133dacdb5f2a0bf365d97ddc244b4},
intrahash = {cf762d23c36c780b787b5fca7d260771},
issn = {0044-2313},
journal = {Zeitschrift fuer Anorganische und Allgemeine Chemie},
keywords = {azopyridine cobalt complex complex;transition copper magnetic metal molybdenum prepn property;crystal structure},
pages = {217--234},
timestamp = {2022-06-15T09:26:56.000+0200},
title = {Edge-sharing of two five-membered metal chelate rings; structures and magnetism of molybdenum(0)-, copper(I)-, and cobalt(II)-complexes with the S-frame ligand azo-2,2'-pyridine},
volume = {598-599},
year = 1991
}
