scholarly journals Kinetic Versus Thermodynamic Metalation Enables Synthesis of Isostructural Homo- and Heterometallic Trinuclear Clusters

2020 ◽  
Author(s):  
Sung-Min Hyun ◽  
Apoorva Upadhyay ◽  
Anuvab Das ◽  
Corey Burns ◽  
Siyoung Sung ◽  
...  
Keyword(s):  
Cluster Expansion ◽  
Metal Clusters ◽  
Systematic Variation ◽  
Selective Synthesis ◽  
Temperature Dependent ◽  
Ion Content ◽  
Trinuclear Complexes ◽  
Trinuclear Clusters ◽  
Hexadentate Ligand ◽  
Programmed Assembly

Temperature-dependent metalation of the new hexadentate ligand (tris(5-(pyridin-2-yl)-1<i>H</i>-pyrrol-2-yl)methane; H<sub>3</sub>TPM) enables the selective synthesis of both mononuclear (<i>i.e. </i>Na(THF)<sub>4</sub>[Fe(TPM)], kinetic product) and trinuclear (<i>i.e.</i> Fe<sub>3</sub>(TPM)<sub>2</sub>, thermodynamic product) complexes. Exposure of Na(THF)<sub>4</sub>[Fe(TPM)] to FeCl<sub>2</sub> or ZnCl<sub>2</sub> triggers cluster expansion to generate homo- or heterometallic trinuclear complexes, respectively. The developed approach enables systematic variation of ion content in isostructural metal clusters via programmed assembly.

scholarly journals Kinetic Versus Thermodynamic Metalation Enables Synthesis of Isostructural Homo- and Heterometallic Trinuclear Clusters

2020 ◽  
Author(s):  
Sung-Min Hyun ◽  
Apoorva Upadhyay ◽  
Anuvab Das ◽  
Corey Burns ◽  
Siyoung Sung ◽  
...  
Keyword(s):  
Cluster Expansion ◽  
Metal Clusters ◽  
Systematic Variation ◽  
Selective Synthesis ◽  
Temperature Dependent ◽  
Ion Content ◽  
Trinuclear Complexes ◽  
Trinuclear Clusters ◽  
Hexadentate Ligand ◽  
Programmed Assembly

Temperature-dependent metalation of the new hexadentate ligand (tris(5-(pyridin-2-yl)-1<i>H</i>-pyrrol-2-yl)methane; H<sub>3</sub>TPM) enables the selective synthesis of both mononuclear (<i>i.e. </i>Na(THF)<sub>4</sub>[Fe(TPM)], kinetic product) and trinuclear (<i>i.e.</i> Fe<sub>3</sub>(TPM)<sub>2</sub>, thermodynamic product) complexes. Exposure of Na(THF)<sub>4</sub>[Fe(TPM)] to FeCl<sub>2</sub> or ZnCl<sub>2</sub> triggers cluster expansion to generate homo- or heterometallic trinuclear complexes, respectively. The developed approach enables systematic variation of ion content in isostructural metal clusters via programmed assembly.

scholarly journals Kinetic versus thermodynamic metalation enables synthesis of isostructural homo- and heterometallic trinuclear clusters

2020 ◽  
Vol 56 (44) ◽  
pp. 5893-5896
Author(s):  
Sung-Min Hyun ◽  
Apoorva Upadhyay ◽  
Anuvab Das ◽  
Corey P. Burns ◽  
Siyoung Sung ◽  
...  
Keyword(s):  
Selective Synthesis ◽  
Temperature Dependent ◽  
Trinuclear Clusters

Temperature-dependent metalation of a new hexadentate enables the selective synthesis of both mononuclear (i.e. kinetic product) and trinuclear (i.e. thermodynamic product) complexes.

scholarly journals Temperature dependent chiroptical response of sigmoidal gold clusters: probing the stability of chiral metal clusters

2018 ◽  
Vol 9 (25) ◽  
pp. 5614-5622 ◽  
Author(s):  
Ping Guo ◽  
Biao Yang ◽  
Li Zhang ◽  
Liang Zhao
Keyword(s):  
Metal Clusters ◽  
Gold Cluster ◽  
Gold Clusters ◽  
Cluster Compounds ◽  
Structural Factors ◽  
Temperature Dependent ◽  
Cluster Stability ◽  
The Stability

Three chiral gold cluster compounds are herein selected to probe how structural factors influence the cluster stability upon heating.

ChemInform Abstract: Temperature Dependent Selective Synthesis of Linear 2-Bromo and 2-Alkoxyfuro[2,3-b]quinolines: Reaction of 3-(2,2-Dibromovinyl-)quinolin-2(1H)-ones with Alcoholic KOH.

ChemInform ◽  
2015 ◽  
Vol 46 (15) ◽  
pp. no-no
Author(s):  
Durgesh Nandini ◽  
Mrityunjaya Asthana ◽  
Kalpana Mishra ◽  
R. P. Singh ◽  
Radhey M. Singh
Keyword(s):  
Selective Synthesis ◽  
Temperature Dependent

Reaktion von [Co(But2PH)2I2] mit [Ru3(CO)12]: Synthese und Röntgenkristallstrukturanalyse von [Ru3(CO)6(μ-H)(μ-I)2(μ-PBut2)(But2PH)]/ Reaction of [Co(But2PH)2I2] with [Ru3(CO)12]: Synthesis and X-Ray Crystal Structure of [Ru3(CO)6(μ-H)(μ-I)2(μ-PBut2)(But2PH)]

1998 ◽  
Vol 53 (8) ◽  
pp. 865-870 ◽  
Author(s):  
Marion Graf ◽  
Kurt Merzweiler ◽  
Clemens Bruhn ◽  
Hans-Christian Böttcher
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Cluster Expansion ◽  
Metal Clusters ◽  
Molecular Structures ◽  
Monoclinic Space Group ◽  
The Novel ◽  
Space Group ◽  
X Ray ◽  
Iodine Transfer

Abstract [Co(But2PH)2I2] (1) reacts with [Ru3(CO)12] in refluxing toluene to give a mixture of products including the novel metal clusters [Ru3(CO)6(μ-H)(μ-I)2(μ-PBut2)(But2PH)] (2) and [Ru3(CO)7(μ-H)(μ-I)(μ-PBut2)2] (3) besides the known complex [Ru3(CO)8(μ-H)2(μ3- PBut)(But2PH)] (4). No cluster expansion products could be observed. Thus the cobalt compound acts merely as a phosphine and iodine transfer reagent. The molecular structures of the metal complexes 1 and 2 were determined by single-crystal X-ray structure analyses. 1 crystallizes in the tetragonal space group P4̄21c with a = 13.230(3), b = 13.230(3), c = 14.788(3)Å, V = 2588.4(9)A . 2 crystallizes in the monoclinic space group P21/c with a = 18.161(2), b = 10.292(2), c = 18.381(2)Å, β = 108.73(10)°, V= 3253.7(8)Å3.

Magnetic Cluster Expansion Study of Chromium Precipitates in Fe-Cr Alloys

2011 ◽  
Vol 172-174 ◽  
pp. 1002-1007 ◽  
Author(s):  
Mikhail Yu. Lavrentiev ◽  
Duc Nguyen Manh ◽  
Sergei L. Dudarev
Keyword(s):  
Cluster Expansion ◽  
Magnetic Order ◽  
Magnetic Ordering ◽  
Expansion Method ◽  
Temperature Dependent ◽  
Magnetic Cluster ◽  
Cluster Expansion Method ◽  
Atom Pairs ◽  
Characteristic Variation ◽  
Magnetic Specific Heat

Magnetic Cluster Expansion method is applied to the investigation of magnetic properties of Fe-Cr alloys treated as a function of Cr content, the spatial distribution of Cr atoms, and temperature. Random Fe-Cr alloys and Cr clusters formed in concentrated alloys are analyzed. We find significant differences between the types of magnetic order characterizing those systems, which are reflected in the characteristic variation of the temperature-dependent magnetic specific heat. Simulations show that in random Fe-Cr alloys and in alloys containing Cr clusters, the interplay between antiferromagnetic interactions characterizing Fe-Cr and Cr-Cr atom pairs gives rise to unusual patterns of finite temperature magnetic ordering.

Sign in / Sign up

Export Citation Format

Share Document