Te4Se2O6 macrocycle stabilizing triangular planar and tetrahedral anions

2015 ◽  
Vol 44 (10) ◽  
pp. 4554-4559 ◽  
Author(s):  
Nagarjuna Kumar Srungavruksham ◽  
Viswanathan Baskar
Keyword(s):  
Solid State ◽  
Anion Exchange ◽  
Molecular Structures ◽  
Exchange Reactions

The anion exchange reactions of Cl-macrocycle 1a with anions of varying geometry (NO3− trigonal planar, ClO4− and BF4− tetrahedral) have been investigated to yield macrocycles 2–4. Solid state molecular structures of these macrocycles are also retained in solution.

Solid-State Anion Exchange Reactions for Color Tuning of CsPbX3 Perovskite Nanocrystals

2016 ◽  
Vol 28 (24) ◽  
pp. 9033-9040 ◽  
Author(s):  
Chris Guhrenz ◽  
Albrecht Benad ◽  
Christoph Ziegler ◽  
Danny Haubold ◽  
Nikolai Gaponik ◽  
...  
Keyword(s):  
Solid State ◽  
Anion Exchange ◽  
Exchange Reactions ◽  
Color Tuning ◽  
Perovskite Nanocrystals

scholarly journals Derivatives of the Triaminoguanidinium Ion, 1. Synthesis, Crystal and Molecular Structures of 1,2,3-Tris(benzylamino)guanidinium Salts

2012 ◽  
Vol 67 (6) ◽  
pp. 631-642 ◽  
Author(s):  
Nicolas Bucher ◽  
Jan Szabo ◽  
Iris M. Oppel ◽  
Gerhard Maas
Keyword(s):  
Solid State ◽  
Anion Exchange ◽  
Molecular Structures ◽  
Guanidinium Chloride ◽  
Crystal And Molecular Structures ◽  
Derivatives Of ◽  
Guanidinium Salts

Triaminoguanidinium chloride was transformed into 1,2,3-tris(benzylamino)guanidinium chloride (3-Cl) in two steps. Anion exchange allowed the preparation of further salts 3-X. The crystal and molecular structures of 3-Cl, 3-I, 3-CF3COO and 3-CF3SO3 were determined. It was found that both the conformation of the cation and the nature of the anion determines the packing in the solid state. Interestingly, three different conformations of the cation were observed in the crystals.

Synthesis and crystal structure analyses of tri-substituted guanidine-based copper(II) complexes

2021 ◽  
Vol 76 (3-4) ◽  
pp. 193-199
Author(s):  
Muhammad Said ◽  
Sadia Rehman ◽  
Muhammad Ikram ◽  
Hizbullah Khan ◽  
Carola Schulzke
Keyword(s):  
Crystal Structure ◽  
Solid State ◽  
Molecular Structures ◽  
Hydroxyl Groups ◽  
Synthesis And Crystal Structure ◽  
Pyramidal Geometry ◽  
Tautomeric Forms ◽  
Square Planar ◽  
Nitrogen Donor ◽  
Square Pyramidal Geometry

Abstract Three guanidine-derived tri-substituted ligands viz. N-pivaloyl-N′,N″-bis-(2-methoxyphenyl)guanidine (L1), N-pivaloyl-N′-(2-methoxyphenyl)-N″-phenylguanidine (L2) and N-pivaloyl-N′-(2-methoxyphenyl)-N″-(2-tolyl)guanidine (L3) were reacted with Cu(II) acetate to produce the corresponding complexes. The significance of the substituent on N″ for the resulting molecular structures and their packing in the solid state has been studied with respect to the structural specifics of the corresponding Cu(II) complexes. The key characteristic of the guanidine-based metal complexation with Cu(II) is the formation of an essentially square planar core with an N2O2 donor set. As an exception, in the complex of L1, the substituent’s methoxy moiety also interacts with the Cu(II) center to generate a square-pyramidal geometry. The hydroxyl groups of the imidic acid tautomeric forms of L1–L3, in addition to N″, are also bonded to Cu(II) in all three complexes rather than the nitrogen donor of the guanidine motif.

scholarly journals Self-assembly of arene ruthenium acylpyrazolone fragments to tetranuclear metallacycles. Molecular structures and solid-state 15N CPMAS NMR correlations

2016 ◽  
Vol 45 (9) ◽  
pp. 3974-3982 ◽  
Author(s):  
Riccardo Pettinari ◽  
Fabio Marchetti ◽  
Claudio Pettinari ◽  
Francesca Condello ◽  
Brian W. Skelton ◽  
...  
Keyword(s):  
Solid State ◽  
Nmr Spectroscopy ◽  
Self Assembly ◽  
Solid State Nmr ◽  
Molecular Structures ◽  
Sandwich Complexes ◽  
Solid State Nmr Spectroscopy ◽  
Half Sandwich

Mono- and tetranuclear Ru(ii) half-sandwich complexes containing acylpyrazolone ligands. 13C and 15N solid state NMR spectroscopy.

Metal–organic cage-based nanoagent for enhanced photodynamic antitumor therapy

2021 ◽  
Author(s):  
Yu-Bin Dong ◽  
Wen-Yan Li ◽  
Chaowei Zhao ◽  
Yue-Feng Zhang ◽  
Qun Guan ◽  
...  
Keyword(s):  
Solid State ◽  
Indocyanine Green ◽  
Anion Exchange ◽  
Near Infrared ◽  
Antitumor Therapy ◽  
Metal Organic ◽  
First Time

Herein we report, for the first time, a Pd6L8(NO3)5.4(ICG)6.6 (ICG = indocyanine green) cage-based hexagonal nanoplate (3) via a combined nanoprecipitation and solid-state anion-exchange approach. 3 possesses near infrared (NIR)...

Anion-exchange reactions of layered double hydroxides

1990 ◽  
Vol 29 (26) ◽  
pp. 5201-5207 ◽  
Author(s):  
Martina Meyn ◽  
Klaus Beneke ◽  
Gerhard Lagaly
Keyword(s):  
Anion Exchange ◽  
Layered Double Hydroxides ◽  
Exchange Reactions ◽  
Double Hydroxides

Experimental and computational structural study of two hindered aminoanthraquinones in crystals and solutions

2000 ◽  
Vol 215 (9) ◽  
Author(s):  
A.V. Yatsenko ◽  
K.A. Paseshnichenko ◽  
S.I. Popov
Keyword(s):  
Solid State ◽  
Single Crystal ◽  
Electronic Spectra ◽  
Molecular Structures ◽  
Amino Group ◽  
Single Crystal Diffraction ◽  
Molecular Conformations ◽  
X Ray ◽  
Crystal And Molecular Structures ◽  
Visible Spectra

The crystal and molecular structures of 2-methyl-1-methylamino-anthraquinone (I) and 1-methylphenylamino-anthraquinone (II) were studied by the X-ray single-crystal diffraction and the visible spectra of crystalline specimens and their solutions were recorded. The molecule I is closely planar, whereas in the molecule II the amino group is 58° rotated out of the plane of the anthraquinone skeleton. In both structures the molecules pack in stacks. The comparison of experimental and calculated (on the DFT and AM1 levels) molecular structures, together with the comparison of experimental and INDO/S-calculated electronic spectra, give the evidence that molecular conformations (especially for II) change upon transfer from the solid state to solutions, and the π-delocalisation throughout the whole molecule enhances in the solid state.

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