Synthesis and X-ray Crystal Structures of Zinc Complexes Supported by Chelating Ligands: Various Reactions of α-Iminopyridines with ZnEt2

2018 ◽  
Vol 644 (12-13) ◽  
pp. 590-597
Author(s):  
Haimang Wang ◽  
Zhiqiang Guo ◽  
Jihong Yang ◽  
Wei Cao ◽  
Yupeng Hua ◽  
...  
Keyword(s):  
Crystal Structures ◽  
Zinc Complexes ◽  
Chelating Ligands ◽  
X Ray

Syntheses and X-ray crystal structures of zinc complexes with an amido-diamine ligand

Polyhedron ◽  
2006 ◽  
Vol 25 (2) ◽  
pp. 279-285 ◽  
Author(s):  
Bing Luo ◽  
Benjamin E. Kucera ◽  
Wayne L. Gladfelter
Keyword(s):  
Crystal Structures ◽  
Zinc Complexes ◽  
X Ray

scholarly journals Synthesis and first X-ray structures of cobalt(II) and cobalt(III) complexes bearing 2,4-dioxo-alkanoic acid dialkylamide ligands

2009 ◽  
Vol 87 (1) ◽  
pp. 328-334 ◽  
Author(s):  
Jian Wang ◽  
Nicholas A Morra ◽  
Hongda Zhao ◽  
Jeffrey ST Gorman ◽  
Vincent Lynch ◽  
...  
Keyword(s):  
Crystal Structures ◽  
Aerobic Oxidation ◽  
Synthetic Chemistry ◽  
Chelating Ligands ◽  
Alkanoic Acid ◽  
X Ray ◽  
X Ray Crystallography

The aerobic oxidation of 5-hydroxy pentenes to trans-tetrahydrofurans (THFs), the Mukaiyama oxidation, has in recent years emerged as a powerful tool in synthetic chemistry. In this report we describe the first crystal structures of 2,4-dioxo-alkanoic acid dialkylamide complexes for both Co(II) and Co(III) salts. The Co(II) structures show an unprecedented arrangement of atoms, with a central Co(II)(H2O)6 flanked by two Co(II) atoms each coordinated with three anionic chelating ligands. The dimeric Co(III) structures show two anionic chelating ligands and bridging hydroxyl groups.Key words: aerobic oxidation, trans-tetrahydrofuran (THF), cobalt, X-ray crystallography, oxidation, coordination.

Chiral Heterocyclic Ligands. VIII. Syntheses and Complexes of New Chelating Ligands Derived From Camphor

1995 ◽  
Vol 48 (9) ◽  
pp. 1549 ◽  
Author(s):  
AA Watson ◽  
DA House ◽  
PJ Steel
Keyword(s):  
Coordination Chemistry ◽  
Transition Metals ◽  
Crystal Structures ◽  
Palladium Complexes ◽  
Chelating Ligands ◽  
Heterocyclic Ligands ◽  
X Ray

The syntheses of 23 new chelating ligands are described. Most of these ligands are derived from the chiral pyrazole (1) which has been linked to a variety of heterocycles , namely pyridine, pyrimidine, pyridazine, isoxazole , benzimidazole, thiophen and furan. In certain cases the parent achiral analogues have also been prepared. Preliminary studies of the coordination chemistry of these ligands with selected transition metals have been carried out. The X-ray crystal structures of palladium complexes of isoxazole- and thiophen-containing ligands have also been determined.

Synthesis, X-ray crystal structures and thermal analyses of some new antimicrobial zinc complexes: New configurations and nano-size structures

2016 ◽  
Vol 61 ◽  
pp. 809-823 ◽  
Author(s):  
A. Masoudiasl ◽  
M. Montazerozohori ◽  
R. Naghiha ◽  
A. Assoud ◽  
P. McArdle ◽  
...  
Keyword(s):  
Crystal Structures ◽  
Thermal Analyses ◽  
Zinc Complexes ◽  
X Ray ◽  
Nano Size

Heterometallische Mehrkernkomplexe von Zink und Cadmium mit cis-[Cr(OH)2(en)2]+-Liganden / Heterom etallic Polynuclear Complexes of Zinc and Cadmium with cis-[Cr(OH)2(en)2]+ Ligands

1996 ◽  
Vol 51 (12) ◽  
pp. 1716-1724 ◽  
Author(s):  
Frank Rominger ◽  
Ulf Thewalt
Keyword(s):  
Crystal Structures ◽  
Heterometallic Complexes ◽  
Chelating Ligands ◽  
Tetrahedral Coordination ◽  
Cadmium Complexes ◽  
X Ray ◽  
Network Of Hydrogen Bonds ◽  
A Chain ◽  
The Stability ◽  
Cadmium Salt

A series of polynuclear heterometallic complexes containing chromium and zinc or cadmium were prepared by the reaction of cis-[CrCl2(en)2]Cl and a zinc or cadmium salt in water and the molecular and crystal structures of 1 to 5 determined by X-ray structure analyses. The products contain chelating or bridging cis-[Cr(OH)2(en)2]+ groups. For the zinc complexes a tetrahedral coordination is observed, and the [Cr(OH)2(en)2]+ units are found to act as bridges. [[ZnCl2(μ-OH)Cr(en)2(μ-OH)]ClO4]n (1) has a chain polymeric structure. [{ZnCl2(μ-OH)Cr(en)2(μ-OH)}2]Cl2 (2) has a cyclic structure. In the case of the cadmium complexes the [Cr(OH)2(en)2]+ units act as chelating ligands. For the three cadmium complexes [Cd3(μ-Cl)4Cl4{Cr(μ3-OH)(μ-OH)(en)2}2]·4H20 (3), [[Cd(μ-Cl)(H2O)2{Cr(μ-OH)2(en)2}](ClO4)(NO3)·2H2O]n; (4), and [Cd2(μ-Cl)2Cl3(H2O)3{ Cr(μ-OH)2(en)2}]n; (5) an octahedral coordination sphere is observed. The cadmium atoms in 3 to 5 are connected by at least one chloro bridge. In the centrosymmetrical pentanuclear complex 3 bridging occurs by face-sharing, and in the chain polymeric complexes 4 and 5 by edge-sharing of the coordination octahedra. In the crystal structures of all complexes a network of hydrogen bonds is observed, which contributes substantially to the stability of the conformation of the chain structures.

X-ray crystal structures of copper(II) nitrate complexes of two isomeric N,O-chelating ligands

1999 ◽  
Vol 284 (2) ◽  
pp. 273-277 ◽  
Author(s):  
Regan J Anderson ◽  
Per H Hagback ◽  
Peter J Steel
Keyword(s):  
Crystal Structures ◽  
Chelating Ligands ◽  
X Ray ◽  
Nitrate Complexes
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