%0 Journal Article %1 Kaim.1987b %A Kaim, Wolfgang %A Kohlmann, Stephan. %D 1987 %J Inorganic Chemistry %K 1 bispyridyl cofactor complex;methoxatin copper dicopper dinuclear model paramagnetic paramagnetic;tetrazine phenanthrolinedione;phenanthrolinedione %N 10 %P 1469--1470 %R 10.1021/ic00257a001 %T Paramagnetic copper(I) dimers %V 26 %X The first paramagnetic Cu(I) dimers L2Cu(m-L1)CuL2+.bul. (L = PPh3, L2 = Ph2PCH2CH2PPh2, 1,5-cyclooctadiene) were obtained as stable species from the reactions of Cu(I) reagents with electron-deficient binucleating ligands L1 = 3,6-bis(2-pyridyl)-1,2,4,5-tetrazine (I) and 4,7-phenanthroline-5,6-dione (II) under reducing conditions. ESR spectroscopy reveals that the unpaired electron resides mainly in the p* orbital of the bridging ligand L1 whereas a small amt. of spin d. is hyperconjugatively transferred to the L2Cu(I) fragments. Complexes of I may be regarded as models for the metal-to-ligand charge-transfer excited state in (a-diimine)/Cu(I) species whereas the a-amino-o-quinone ligand II can serve as model for the dehydrogenase and amine oxidase cofactor methoxatin. on SciFinder(R)

@article{Kaim.1987b, abstract = {The first paramagnetic Cu(I) dimers [L2Cu(\textgreek{m}-L1)CuL2]+.bul. (L = PPh3, L2 = Ph2PCH2CH2PPh2, 1,5-cyclooctadiene) were obtained as stable species from the reactions of Cu(I) reagents with electron-deficient binucleating ligands L1 = 3,6-bis(2-pyridyl)-1,2,4,5-tetrazine (I) and 4,7-phenanthroline-5,6-dione (II) under reducing conditions. ESR spectroscopy reveals that the unpaired electron resides mainly in the \textgreek{p}* orbital of the bridging ligand L1 whereas a small amt. of spin d. is hyperconjugatively transferred to the L2Cu(I) fragments. Complexes of I may be regarded as models for the metal-to-ligand charge-transfer excited state in (\textgreek{a}-diimine)/Cu(I) species whereas the \textgreek{a}-amino-o-quinone ligand II can serve as model for the dehydrogenase and amine oxidase cofactor methoxatin. [on SciFinder(R)]}, added-at = {2022-06-15T11:26:56.000+0200}, author = {Kaim, Wolfgang and Kohlmann, Stephan.}, biburl = {https://puma.ub.uni-stuttgart.de/bibtex/2ba0f2947ced7d1b23841b493e8d4663c/huebleriac}, doi = {10.1021/ic00257a001}, interhash = {8ff94642c1084050bf244830c1771687}, intrahash = {ba0f2947ced7d1b23841b493e8d4663c}, issn = {0020-1669}, journal = {Inorganic Chemistry}, keywords = {1 bispyridyl cofactor complex;methoxatin copper dicopper dinuclear model paramagnetic paramagnetic;tetrazine phenanthrolinedione;phenanthrolinedione}, number = 10, pages = {1469--1470}, timestamp = {2022-06-15T09:26:56.000+0200}, title = {Paramagnetic copper(I) dimers}, volume = 26, year = 1987 }