Spontaneous resolution of a Δ/Λ-chiral-at-metal pseudo-tetrahedral Schiff-base zinc complex to a racemic conglomerate with C–H⋯O organized 41- and 43-helices

CrystEngComm ◽  
2018 ◽  
Vol 20 (33) ◽  
pp. 4724-4734 ◽  
Author(s):  
Mohammed Enamullah ◽  
Vera Vasylyeva ◽  
Mohammad Abdul Quddus ◽  
Mohammad Khairul Islam ◽  
Simon-Patrick Höfert ◽  
...  
Keyword(s):  
Schiff Base ◽  
Zinc Complex ◽  
Spontaneous Resolution ◽  
Supramolecular Interactions

Weak supramolecular interactions can be decisive!

scholarly journals Revealing the chirality origin and homochirality crystallization of Ag14 nanocluster at the molecular level

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Xiao-Qian Liang ◽  
Ying-Zhou Li ◽  
Zhi Wang ◽  
Shan-Shan Zhang ◽  
Yi-Cheng Liu ◽  
...  
Keyword(s):  
Molecular Level ◽  
Spontaneous Resolution ◽  
Silver Nanoclusters ◽  
Supramolecular Interactions ◽  
Hydrogen Atoms ◽  
Special Effects ◽  
Π Stacking Interaction ◽  
Origin Of Chirality ◽  
Present Characteristic ◽  
Aromatic Hydrogen

AbstractAlthough chirality is an ever-present characteristic in biology and some artificial molecules, controlling the chirality and demystifying the chirality origin of complex assemblies remain challenging. Herein, we report two homochiral Ag14 nanoclusters with inherent chirality originated from identical rotation of six square faces on a Ag8 cube driven by intra-cluster π···π stacking interaction between pntp− (Hpntp = p-nitrothiophenol) ligands. The spontaneous resolution of the racemic (SD/rac-Ag14a) to homochiral nanoclusters (SD/L-Ag14 and SD/R-Ag14) can be realized by re-crystallizing SD/rac-Ag14a in acetonitrile, which promotes the homochiral crystallization in solid state by forming C–H···O/N hydrogen bonds with nitro oxygen atoms in pntp− or aromatic hydrogen atoms in dpph (dpph = 1,6-bis(diphenylphosphino)hexane) on Ag14 nanocluster. This work not only provides strategic guidance for the syntheses of chiral silver nanoclusters in an all-achiral environment, but also deciphers the origin of chirality at molecular level by identifying the special effects of intra- and inter-cluster supramolecular interactions.

Copper(II) complexes with tridentate N2O donor Schiff base isomers: Modulation of molecular and crystalline architectures through supramolecular interactions

Polyhedron ◽  
2013 ◽  
Vol 60 ◽  
pp. 68-77 ◽  
Author(s):  
Mithun Das ◽  
Biswa Nath Ghosh ◽  
Arto Valkonen ◽  
Kari Rissanen ◽  
Shouvik Chattopadhyay
Keyword(s):  
Schiff Base ◽  
Supramolecular Interactions

scholarly journals STRUCTURAL AND MOLECULAR DETERMINATION OF A ZINC COMPLEX WITH SCHIFF BASE

2015 ◽  
Author(s):  
S. F. F. Santos ◽  
C. A. Wegermann ◽  
M. S. Monsalve ◽  
C. A. Simone ◽  
A. M. C. Ferreira ◽  
...  
Keyword(s):  
Schiff Base ◽  
Zinc Complex ◽  
Molecular Determination

scholarly journals Chiral crystallization of a zinc(II) complex

2021 ◽  
Vol 77 (5) ◽  
pp. 542-546
Author(s):  
Shabana Noor ◽  
Shintaro Suda ◽  
Tomoyuki Haraguchi ◽  
Fehmeeda Khatoon ◽  
Takashiro Akitsu
Keyword(s):  
Hydrogen Bond ◽  
Schiff Base ◽  
Complex Molecule ◽  
Solvent Molecule ◽  
Hirshfeld Surface ◽  
Supramolecular Interactions ◽  
Orthorhombic Space Group ◽  
Complex Molecules ◽  
Trigonal Bipyramidal ◽  
Distorted Trigonal Bipyramidal

The compound, {6,6′-dimethoxy-2,2′-[(4-azaheptane-1,7-diyl)bis(nitrilomethanylidyne)]diphenolato}zinc(II) methanol monosolvate, [Zn(C22H27N3O4)]·CH3OH, at 298 K crystallizes in the orthorhombic space group Pna21. The Zn atom is coordinated by a pentadentate Schiff base ligand in a distorted trigonal–bipyramidal N3O2 geometry. The equatorial plane is formed by the two phenolic O and one amine N atom. The axial positions are occupied by two amine N atoms. The distorted bipyramidal geometry is also supported by the trigonality index (τ), which is found to be 0.85 for the molecule. In the crystal, methanol solvent molecule is connected to the complex molecule by an O—H...O hydrogen bond and the complex molecules are connected by weak supramolecular interactions, so achiral molecules generate a chiral crystal. The Hirshfeld surface analysis suggests that H...H contacts account for the largest percentage of all interactions.

Spontaneous resolution of a bis(η1-methylcyclopentadienyl)zinc complex

2011 ◽  
Vol 377 (1) ◽  
pp. 181-184 ◽  
Author(s):  
Susanne Olsson ◽  
Anders Lennartson
Keyword(s):  
Zinc Complex ◽  
Spontaneous Resolution

Preparation and Characteristics of Novelty Chitosan Schiff Base and its Zinc Complexes

2011 ◽  
Vol 239-242 ◽  
pp. 1364-1367 ◽  
Author(s):  
Xue Wen Wu ◽  
Yan Xiong
Keyword(s):  
Schiff Base ◽  
Elemental Analysis ◽  
Water Loss ◽  
Zinc Complex ◽  
Physicochemical Characteristics ◽  
Zinc Complexes ◽  
Thermal Behaviors ◽  
Ft Ir ◽  
And Performance ◽  
Chitosan Schiff Base

In this paper, a new kind of chitosan schiff base and its zinc complexes were prepared. Chitosan schiff base (CS-DBSB) was obtained when 3, 5-Di-tert-butyl salicylaldehyde was introduced to the C-2 nitrogen position of chitosan. Its zinc complex of CS-DBSB (CS-DBSB-Zn) was also prepared. The structure and performance of physicochemical characteristics of CS-DBSB and CS-DBSB-Zn were examined by FT-IR, elemental analysis, thermogravimetric (TG). The thermal behaviors of CS-DBSB and CS-DBSB-Zn were described. TG curves presented three events including water loss, decomposition of the polysaccharide generating a carbonaceous residue that burns at higher temperatures.

ChemInform Abstract: New Solid-Phase Catalysts for Asymmetric Synthesis: Cross-Linked Polymers Containing a Chiral Schiff Base-Zinc Complex.

ChemInform ◽  
1990 ◽  
Vol 21 (28) ◽  
Author(s):  
S. ITSUNO ◽  
Y. SAKURAI ◽  
K. ITO ◽  
T. MARUYAMA ◽  
S. NAKAHAMA ◽  
...  
Keyword(s):  
Schiff Base ◽  
Asymmetric Synthesis ◽  
Zinc Complex ◽  
Solid Phase ◽  
Chiral Schiff Base

Bifunctional zinc and magnesium Schiff-base complexes containing quaternary ammonium side-arm for epoxide/CO2 coupling reaction

2021 ◽  
Author(s):  
Arnut Virachotikul ◽  
Nattiya Laiwattanapaisarn ◽  
Kittipong Chainok ◽  
Khamphee Phomphrai
Keyword(s):  
Schiff Base ◽  
Quaternary Ammonium ◽  
Zinc Complex ◽  
Coupling Reaction ◽  
Schiff Base Complexes ◽  
Iodide Anion

Novel bifunctional zinc and magnesium Schiff-base complexes containing quaternary ammonium halide side-arm were developed. The zinc complex 1Et-I (0.02 mol%) having iodide anion has shown the highest TOF for propylene...

A Schiff base Zinc Complex and its Photoluminescent Properties

2007 ◽  
Author(s):  
Long Qian ◽  
Tianzhi Yu ◽  
Yuling Zhao ◽  
Hui Zhang ◽  
Duowang Fan
Keyword(s):  
Schiff Base ◽  
Zinc Complex
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