Results 51 to 60 of about 40,715 (135)
Short Wavelength Limit of the Dynamic Matsubara Local Field Correction
ABSTRACT We investigate the short wavelength limit of the dynamic Matsubara local field correction G˜q,zl$$ \tilde{G}\left(\mathbf{q},{z}_l\right) $$ of the uniform electron gas based on direct ab initio path integral Monte Carlo (PIMC) results over an unprecedented range of wavenumbers, q≲20qF$$ q\lesssim 20{q}_{\mathrm{F}} $$, where qF$$ {q}_{\mathrm{
Tobias Dornheim+3 more
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A Monocationic biscyclometalated Ir(III) complex with triarylborane‐bound 2,2′‐bipyridine was designed and synthesized, and its photophysical properties were investigated. The triarylborane–Ir(III) complex exhibited significantly enhanced absorption in the 300–400 nm region compared to pristine biscyclometalated Ir(III) complexes, attributed to ...
Ryo Fukumoto+6 more
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A new triarylmethyl cation (*Tr+), designed to closely mimic Ph3C+ in reactivity has been prepared as a [HCB11Cl11]‐ salt. *Tr+ very slightly exceeds the Lewis acidity of Ph3C+ in chloride and hydride transfer reactions, but possesses two orders of magnitude higher solubility in organic solvents of low polarity.
Jack P. Raker, Oleg V. Ozerov
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Tridentate Bis‐pyridine Nitrenium Ligands and their Coordination Properties
π‐acidic ligands play a significant role in coordination chemistry and catalysis. A unique example of π‐acidic ligands is the N‐heterocyclic nitrenium cation which is an isoelectronic and isostructural analog of the widely utilized N‐heterocyclic carbene.
Mark Gandelman+2 more
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The reaction of an aqueous solution of Na3SbS4·9H2O with a Co(II) salt dissolved in acetonitrile in the presence of tris(2‐aminoethyl)amine afforded crystallization of [Co2(S2)2(tren)2]3[SbS4]2 · 21.5 H2O which contains in situ formed S22‐ anions and Co(III) cations formed by oxididation of Co(II).
Felix Danker+4 more
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The pincer complex (2‐Tol)PtII(NCN) (NCN = [2,6‐bis{(dimethylamino)methyl}phenyl‐N,C,N]‐) reacts with diiodine via electrophilic cleavage to give PtII(NCN)I and 2‐tolyl iodide, together with oxidative addition to give cis‐(2‐Tol)PtIV(NCN)I2 (van Koten et al. 1990).
Allan J. Canty+2 more
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Phosphorus‐substituted tetrylenes and ditetrelenes remain something of a rarity. The reaction between SnCl2 and two equivalents of (Dep2P)Li at low temperature gave the bis(phosphanyl)stannylene {(Dep)2P}2Sn (4Sn), although this compound decomposes in solution at room temperature (Dep = 2,6‐Et2C6H3).
Keith Izod+6 more
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Polyoxotungstates‐stabilized gold nanoparticles: how to transfer from an aqueous suspension to CH3CN
The present study aimed to evaluate available methods for preparing suspensions of gold nanoparticles stabilized by polyoxometalates (POMs@AuNPs) in CH3CN, a solvent commonly used in oxidation reactions. POMs@AuNPs were successfully synthesized in CH3CN using three different approaches: (i) in situ generation of nanoparticles via chemical reduction of ...
Richard Villanneau+8 more
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Carbonyl iron complexes bearing cyclopentadienone/hydroxycyclopentadienyl ligands and N‐heterocyclic carbene as non‐innocent and ancillary ligands, are active as ammonia‐borane dehydrocoupling catalysts under photo‐activation conditions. Dehydrogenation occurs at room temperature and is complete (in NMR tube) after 2h with 10 mol% of cationic complex 2,
Rita Mazzoni+10 more
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Transition‐Metal‐Free Carboxylation of Aryl Boronates in Supercritical CO2
Carboxylation using stable and abundant CO2 as a carbon source would be an attractive option in synthetic organic chemistry if the use of highly reactive organometals or toxic and expensive transition metals can be avoided. Herein we report a transition‐metal‐free direct carboxylation of aryl trialkoxyboronates in supercritical CO2 (scCO2), promoted by
Jun Odake+2 more
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