%0 Journal Article %1 Rall.1998 %A Rall, Jochen %A Stange, Andreas F. %A Hubler, Klaus %A Kaim, Wolfgang. %D 1998 %J Angewandte Chemie, International Edition %K azophenine complex complex;isomerization complexation copper prepn structure structure;crystal %N 19 %P 2681--2682 %R 10.1002/(SICI)1521-3773(19981016)37:19\textless2681::AID-ANIE2681\textgreater3.0.CO;2-9 %T A coordination-induced 1,4 $\rightarrow$ 1,2-quinonediimine isomerization %V 37 %X Treatment of azophenine (ap) with Cu(PPh3)4BF4 gave Cu(PPh3)2(ap)BF4 (I). I.3Me2CO is monoclinic, space group P21/c, Z = 4, R = 0.070, Rw = 0.194. The 4-coordinate Cu(I) center is bound in a chelate manner by 2 o-quinonediimine N-donor centers. There has been an isomerization from the usually more stable p-quinonediimine state the higher energy o-quinonediimine form in the formation of the complex. This situation results in the occurrence of a metal-to-ligand charge transfer absorption of the complex at 525 nm; the long-wavelength intraquinone transition at 390 nm to shifted to 395 nm in the complex. on SciFinder(R)

@article{Rall.1998, abstract = {Treatment of azophenine (ap) with [Cu(PPh3)4]BF4 gave [Cu(PPh3)2(ap)]BF4 (I). I.3Me2CO is monoclinic, space group P21/c, Z = 4, R = 0.070, Rw = 0.194. The 4-coordinate Cu(I) center is bound in a chelate manner by 2 o-quinonediimine N-donor centers. There has been an isomerization from the usually more stable p-quinonediimine state the higher energy o-quinonediimine form in the formation of the complex. This situation results in the occurrence of a metal-to-ligand charge transfer absorption of the complex at 525 nm; the long-wavelength intraquinone transition at 390 nm to shifted to 395 nm in the complex. [on SciFinder(R)]}, added-at = {2022-06-15T11:26:56.000+0200}, author = {Rall, Jochen and Stange, Andreas F. and Hubler, Klaus and Kaim, Wolfgang.}, biburl = {https://puma.ub.uni-stuttgart.de/bibtex/283ab4291e927674a45c2be4d7fe1f64f/huebleriac}, doi = {10.1002/(SICI)1521-3773(19981016)37:19{\textless}2681::AID-ANIE2681{\textgreater}3.0.CO;2-9}, interhash = {dbf799de686915222bd4d4ac81df138e}, intrahash = {83ab4291e927674a45c2be4d7fe1f64f}, issn = {1433-7851}, journal = {Angewandte Chemie, International Edition}, keywords = {azophenine complex complex;isomerization complexation copper prepn structure structure;crystal}, number = 19, pages = {2681--2682}, timestamp = {2022-06-15T09:26:56.000+0200}, title = {A coordination-induced 1,4 $\rightarrow$ 1,2-quinonediimine isomerization}, volume = 37, year = 1998 }