Results 21 to 30 of about 23,422 (216)
Synthesis of new derivatives of hydrazinecarbothioamides and 1,2,4-triazoles and evaluation of their antimicrobial activities [PDF]
Journal of the Serbian Chemical Society, 2015 A new series of hydrazinecarbothioamides 6-9 bearing 5H-dibenzo[a,d][7]annulene moiety were synthesized. Cyclization of 6-9 in NaOH solution produced the corresponding 1,2,4-triazoles-3(4H)-thiol 10-13, which proved to be axial isomers.
Socea Laura I. +5 more
doaj +1 more source
How does aromaticity rule the thermodynamic stability of hydroporphyrins? [PDF]
, 2011 Several measures of aromaticity including energetic, magnetic, and electron density criteria are employed to show how aromatic stabilization can explain the stability sequence of hydroporphyrins, ranging from porphin to octahydroporphin, and their ...
Bultinck, Patrick +5 more
core +2 more sources
Solid state physicochemical properties and applications of organic and metallo-organic fullerene derivatives [PDF]
, 2016 We review the fundamental properties and main applications of organic derivatives and complexes of fullerenes in the solid-state form. We address in particular the structural properties, in terms of crystal structure, polymorphism, orientational ...
Macovez, Roberto +3 more
core +2 more sources
Structure and Phase Transitions of the 6, 6-Cyclopropane Isomer of C_ {61} H_ {2} [PDF]
, 2000 We have used x-ray powder diffraction and differential scanning calorimetry to study the crystalline structures and thermal behavior of the 6,6-cyclopropane isomer of C61H2.
Brandt, B. M. +8 more
core +2 more sources
Design of annulene-within-an-annulene systems by the altanisation approach. A study ofaltan-[n]annulenes [PDF]
Physical Chemistry Chemical Physics, 2020 Computations on neutral and charged [n]annulenes confirm the general effectiveness of altanisation to design paratropic perimeter circulations. An extension of the design strategy is required for open-shell singlet species.
Matteo Piccardo +4 more
openaire +5 more sources
Palladiumkomplexe mit porphinoidem Ligandsystem
CHIMIA, 1980 In the presence of palladium(II) salts the bicyclic amidine 1 forms diazaporphinpalladium complexes by cyclocondensation. Depending on the reaction conditions the 1,11-dimethoxy complex 2, the 1-methoxy complex 3 or the annulene complex 4 are obtained ...
Peter Geisser +2 more
doaj +1 more source
Angewandte Chemie, Volume 137, Issue 49, December 1, 2025.Innovative catalyst design is advancing precision‐controlled catalysis for CO2 reduction. This minireview investigates the forefront of photocatalytic and electrocatalytic CO2 reduction (CO2RR) leveraging metal nanoclusters (NCs), metal–organic frameworks (MOFs), and covalent organic frameworks (COFs), concentrating on structure–activity correlations ...
Tsukasa Irie +3 more
wiley +2 more sources
Comparisons of the Sombor Index of Alkane, Alkyl, and Annulene Series with Their Molecular Mass
Journal of Chemistry, 2022 Suppose G is an undirected simple graph. A topological index for G is a number with this property that it is invariant under all graph isomorphisms with applications in chemistry.
Maryam Mohammadi +2 more
doaj +1 more source
(5Z,7Z,9Z)-5,10-Dibromobenzo[8]annulene
Acta Crystallographica Section E, 2013 In the structure of the title compound, C12H8Br2, the two bromine substituents are oriented exo to the boat-shaped cyclooctatetraene at the two ring sites that are β to the ring fusion positions.
Christopher O. Bender +1 more
doaj +1 more source
C, 2023 [5.5.5.5]hexaene is a [12]annulene ring with a symmetrically bound carbon atom in its center. This is the smallest hydrocarbon with a hyperbolic paraboloid shape.
Amir Karton
doaj +1 more source