¹H NMR global diatropicity in copper hydride complexes

Abstract

Understanding the magnetic response of electrons in nanoclusters is essential to interpret their NMR spectra thereby providing guidelines for their synthesis towards various target applications. Here, we consider two copper...

Aminations of Aryl Halides Using Nitroaromatics as Coupling Partners: Overcoming the Hydrodehalogenation Pathway under a Hydrogen Atmosphere in Water

“…Furthermore, in situ generated Cu–Pd nanoparticles were analyzed using 1 H NMR spectroscopy to ensure the formation of metal-hydride-type species (Figure B; for details, see the Supporting Information, Page S8). 1 H NMR spectrum of this sample indicated two peaks in the anticipated metal-hydride region, −0.26 and −0.4 ppm. , The broad signal at −0.4 ppm could be the BH 4 – -derived species, whereas the signal around −0.26 ppm is expected to be the copper-hydride-type species . The above signals were chemically distinct from those of NaBH 4 and CuBH 4 in aqueous PS-750-M (see Figure S4).…”

“…1 H NMR spectrum of this sample indicated two peaks in the anticipated metal-hydride region, −0.26 and −0.4 ppm. 57,58 The broad signal at −0.4 ppm could be the BH 4 − -derived species, whereas the signal around −0.26 ppm is expected to be the copperhydride-type species. 58 The above signals were chemically distinct from those of NaBH 4 and CuBH 4 in aqueous PS-750-M (see Figure S4).…”

Alloying and dealloying of Au18Cu32nanoclusters at precise locationsviacontrolling the electronegativity of substituent groups on thiol ligands

“…Ligand-protected ultrasmall metal nanoparticles (also called metal nanoclusters) have attracted considerable research interest owing to their atomically precise structures, unique physical-chemical properties, and promising applications. [1][2][3][4][5][6][7][8][9][10][11][12][13] Unlike large nanoparticles, metal nanoclusters exhibit strong quantum-size effects; that is, changing one atom in a nanocluster will introduce non-negligible disturbances in its electronic structure, drastically affecting its catalytic and optical performance. [14][15][16][17][18][19][20][21][22] These properties of metal nanoclusters provide a fascinating opportunity to study their structure-property relationship at the atomic level.…”

“…clusters contains only Cu atoms. The occupancy results clearly show that 12 metal sites(1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12) on the dodecahedral M 20 shell are doped in a centrosymmetric manner, where Cu occupancy in the motif at positions 1, 3, 5, 7, 9, and 11 is 78.6%, 80.7%, 85.0%, 77.4%, 80.1%, and 82.6%, respectively (Fig.S3a †). Meanwhile, the 12 metal sites at the core comprise only Au.…”

One-Pot Graphene Supported Pt3Cu Nanoparticles—From Theory towards an Effective Molecular Oxygen Reduction Reaction Catalyst

“…Therefore, these studies could serve as a reference for future experiments that could be performed on this alloy. The analysis of MEP CPs has been extensively used to find the bond order and connectivity of numerous systems, such as metal and non-metal clusters [ 27 , 28 ], transition metal complexes [ 29 ], and alkali metal clusters [ 30 , 31 ], as documented in the literature.…”