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- W2026294545 abstract "Abstract Addition of nitrosobenzene to β‐diketiminato and tris(pyrazolyl)borate copper complexes [[Me 2 NN F6 ]Cu(NCMe)] ( 2 ) and [ i Pr2 TpCu(NCMe)] ( 3 ) gives the corresponding nitrosobenzene adducts [[Me 2 NN F6 ]Cu(η 2 ‐ONPh)] ( 5 ) and [ i Pr2 TpCu{κ 1 ‐N(O)Ph}] ( 6 ). Backbonding to the nitrosoarene is strongest via the η 2 ‐ON binding mode, which is sterically inaccessible for the tris(pyrazolyl)borate complexes. The strength of the interaction is judged by the N–O bond length, the ν NO stretching frequencies observed for 5 and 6 , as well as by the DFT LUMO energies of 5 ‐η 2 ‐ON, 5‐ κ 1 ‐N, 6 ‐κ 1 ‐N, which range from highest to lowest. Nitrosoarene complexes 5 and 6 are also produced upon reaction of [[Me 2 NN F6 ]Cu(NCMe)] ( 2 ) and [ i Pr2 TpCu(NCMe)] ( 3 ) with 2 equiv. N ‐phenylhydroxylamine (PhNHOH), though a considerable amount of the azoxybenzene PhN=N(O)Ph is observed along with 6 . The addition of slight excess of NO to 5 and 6 results in the formation of copper(II) diazeniumdiolates [[Me 2 NN F6 ]Cu(κ 2 ‐O 2 N 2 Ph)] ( 7 ) and [ i Pr2 TpCu(κ 2 ‐O 2 N 2 Ph)] ( 8 ), which exhibit square‐planar and square‐pyramidal geometries, respectively. These findings give insight into PhNO and PhHNOH reactivity at copper(I) and foreshadow possible transformations of considerably more reactive nitroxyl (HNO) and hydroxylamine (H 2 NOH) analogues." @default.
- W2026294545 created "2016-06-24" @default.
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- W2026294545 date "2013-07-01" @default.
- W2026294545 modified "2023-09-24" @default.
- W2026294545 title "Copper <i>C</i> ‐Nitroso Compounds: Activation of Hydroxylamines and NO Reactivity" @default.
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- W2026294545 doi "https://doi.org/10.1002/ejic.201300378" @default.
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