Metallacycles with Stereogenic Metal Centers: Synthesis and Characterization of Diastereomeric Cycloruthenated Chiral Amines

1995 ◽  
Vol 14 (10) ◽  
pp. 4559-4569 ◽  
Author(s):  
Saeed Attar ◽  
John H. Nelson ◽  
Jean Fischer ◽  
Andre de Cian ◽  
Jean-Pascal Sutter ◽  
...  
Keyword(s):  
Synthesis And Characterization ◽  
Chiral Amines ◽  
Metal Centers

scholarly journals Synthesis and Characterization of New Cyclam-Based Zr(IV) Alkoxido Derivatives

Reactions ◽  
2021 ◽  
Vol 2 (3) ◽  
pp. 323-332
Author(s):  
Luis G. Alves ◽  
Ana M. Martins
Keyword(s):  
Carbon Dioxide ◽  
Solid State ◽  
Molecular Structures ◽  
Synthesis And Characterization ◽  
Metal Centers ◽  
Trigonal Prismatic

In this study, new mono- and di-alkoxido zirconium(IV) complexes supported by tetradentate dianionic cyclam ligands were synthesized and characterized. These compounds were obtained by reaction of the parent Zr(IV) dichlorido species with one or two equivalents of the corresponding lithium alkoxido, whereas (3,5-Me2Bn2Cyclam)Zr(OPh)2 was prepared by protonolysis of the orthometallated species (3,5-Me-C6H4CH2)2Cyclam)Zr with phenol. The solid-state molecular structures of (Bn2Cyclam)ZrCl(OtBu) and (4-tBuBn2Cyclam)Zr(OiPr)2 show a trigonal prismatic geometry around the metal centers. (Bn2Cyclam)Zr(SPh)(OtBu) and (Bn2Cyclam)ZrMe(OiPr) were prepared by reaction of (Bn2Cyclam)ZrCl(OR) (R = iPr, tBu) with one equivalent of LiSPh or MeMgCl, respectively. The reactions of (Bn2Cyclam)Zr(OiPr)2 and (4-tBuBn2Cyclam)Zr(OiPr)2 with carbon dioxide suggested the formation of species that correspond to the addition of four CO2 molecules.

High Yield Synthesis and Characterization of Sn6(μ3-O)4(μ3-OSiMe3)4:  A Novel Main Group Cluster for the Support of Multiple Transition Metal Centers

1997 ◽  
Vol 119 (4) ◽  
pp. 756-760 ◽  
Author(s):  
Lawrence R. Sita ◽  
Rimo Xi ◽  
Glenn P. A. Yap ◽  
Louise M. Liable-Sands ◽  
Arnold L. Rheingold
Keyword(s):  
Transition Metal ◽  
Main Group ◽  
High Yield ◽  
Synthesis And Characterization ◽  
Metal Centers

scholarly journals [CrF(O2CtBu)2]9: Synthesis and Characterization of a Regular Homometallic Ring with an Odd Number of Metal Centers and Electrons

2016 ◽  
Vol 55 (31) ◽  
pp. 8856-8859 ◽  
Author(s):  
Robert J. Woolfson ◽  
Grigore A. Timco ◽  
Alessandro Chiesa ◽  
Inigo J. Vitorica-Yrezabal ◽  
Floriana Tuna ◽  
...  
Keyword(s):  
Synthesis And Characterization ◽  
Metal Centers

scholarly journals First Cobalt(II) Spin Crossover Compound with N4S2-Donorset

Molecules ◽  
2020 ◽  
Vol 25 (4) ◽  
pp. 855 ◽  
Author(s):  
Fabian Fürmeyer ◽  
Danny Münzberg ◽  
Luca M. Carrella ◽  
Eva Rentschler
Keyword(s):  
Magnetic Moment ◽  
Metal Ion ◽  
Room Temperature ◽  
Spin Crossover ◽  
Synthesis And Characterization ◽  
Metal Centers ◽  
Mononuclear Complexes

Herein we report the synthesis and characterization of a novel bis-tridentate 1,3,4-thiadiazole ligand (L = 2,5-bis[(2-pyridylmethyl)thio]methyl-1,3,4-thiadiazole). Two new mononuclear complexes of the type [MII(L)2](ClO4)2 (with M = FeII (C1) and CoII (C2)) have been synthesized, containing the new ligand (L). In both complexes the metal centers are coordinated by an N4S2-donorset and each of the two ligands is donating to the metal ion with just one of the tridentate pockets. The iron(II) complex (C1) is in the low spin [LS] state below room temperature and shows an increase in the magnetic moment only above 300 K. In contrast, the cobalt(II) complex (C2) shows a gradual spin crossover (SCO) with T1/2 = 175 K. To our knowledge, this is the first cobalt(II) SCO complex with an N4S2-coordination.

scholarly journals [CrF(O2CtBu)2]9: Synthesis and Characterization of a Regular Homometallic Ring with an Odd Number of Metal Centers and Electrons

2016 ◽  
Vol 128 (31) ◽  
pp. 9002-9005 ◽  
Author(s):  
Robert J. Woolfson ◽  
Grigore A. Timco ◽  
Alessandro Chiesa ◽  
Inigo J. Vitorica-Yrezabal ◽  
Floriana Tuna ◽  
...  
Keyword(s):  
Synthesis And Characterization ◽  
Metal Centers

scholarly journals Synthesis and Spectroscopic Analysis of Novel Polynuclear Rhenium(I) Complexes of the Form [Re(CO)3Cl]n[tppq] (n = 1, 2, 3, or 4; tppq = 2,3,1,8-tetra-2-Pyridylpyrazino[2,3-g]quinoxalineJ

KIMIKA ◽  
2010 ◽  
Vol 23 ◽  
pp. 55-63
Author(s):  
Girlie Naomi N. Sison ◽  
Arnie R. De Leon ◽  
Janir T. Datukan
Keyword(s):  
Transition Metal Complexes ◽  
Spectroscopic Analysis ◽  
Synthesis And Characterization ◽  
Spectroscopic Techniques ◽  
Metal Centers ◽  
Bridging Ligand ◽  
Synthetic Procedure ◽  
Reduced Products ◽  
Further Development

A number of transition metal complexes have been investigated as potential electrocatalystsfor C02 reduction. Among these are rhenium monometallic complexes, which have shownunique activity towards C02 reduction. Further development of multimetallic systems,capable of storing multiple equivalents of electrons has shown some potential in increasingthe selectivity of the C02 conversion processes toward highly reduced products. This studyreports the synthesis and characterization of novel polynuclear rhenium(I) complexes whererhenium is incorporated to the bridging ligand tppq (2,3,7,8-tetra-2-pyridylpyrazino[2,3-g]quinoxaline), which is capable of attaching up to four metal centers. The resultingcomplexes were characterized using different spectroscopic techniques (infrared, UV-Vis,emission) and cyclic voltammetry. The results suggest that the synthetic procedure adoptedwas successful.

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