Synthesis and molecular structure of Cr(salen)(μ-N)RhCl(COD): the first example of a heterobimetallic nitride-bridged complex containing chromium
摘要:
Five-coordinate Cr(N)(salen) {salen is 2,2 '-[ethane-1,2-diylbis-(nitrilomethylidyne)]diphenolate} reacts with [RhCl(COD)](2) (COD is 1,5-cyclooctadiene) to yield the heterobimetallic nitride-bridged title compound, namely chlorido-2 kappa Cl-[2(eta(4))-1,5-cyclooctadiene]{2,2 '-[ethane-1,2-diylbis(nitrilomethylidyne)]-diphenolato-1 kappa O-4,N,N ',O '}-mu-nitrido-1:2 kappa N-2:N-chromium(V)-rhodium(I), [CrRh(C16H14N2O2)ClN(C8H12)]. The Cr-N bond of 1.5936 (14) angstrom is elongated by only 0.035 angstrom compared to the terminal Cr-N bond in the precursor. The nitride bridge is close to being linear [173.03 (9)degrees] and the Rh-N bond of 1.9594 ( 14) angstrom is very short for a monodentate nitrogen-donor ligand, indicating significant pi-acceptor character of the Cr N group.
Heterobimetallic Nitride Complexes from Terminal Chromium(V) Nitride Complexes: Hyperfine Coupling Increases with Distance
作者:Jesper Bendix、Christian Anthon、Magnus Schau-Magnussen、Theis Brock-Nannestad、Johan Vibenholt、Muniza Rehman、Stephan P. A. Sauer
DOI:10.1002/anie.201008153
日期:2011.5.2
stronger: Terminal chromium(V) nitride complexes (see picture) react with low‐valent platinum‐metal complexes as well as with main‐group Lewis acids to yield nitride‐bridged systems. Rigorous fitting of the EPR data shows that the superhyperfine coupling of the chromium(V) center with the 14N nuclear spin approximately doubles in response to the formation of a CrN bridge. This effect also exists in computations
The preparation of nitridomanganese and nitridochromium macrocyclic complexes by complete intermetal nitrogen atom transfer from nitridomanganese octaethylporphyrin
作者:Frank L. Neely、Lawrence A. Bottomley
DOI:10.1016/s0020-1693(00)80751-3
日期:1992.2
Atomtransferreactions involve the net transfer of an atom and one or more electrons from a donor molecule to an acceptor [l]. Over the past two decades, metal-centeredoxygenatomtransferreactions have been intensively studied. Oxygenatomtransfer from M=O containing donor complexes to olefins, paraffins and other substrates has been achieved and a consistent mechanistic picture is beginning to