Results 31 to 40 of about 2,231 (184)
Synthesis of Conjugated Linear and Cyclic Polyynes by Selective Alkyne Metathesis
Angewandte Chemie, EarlyView.The formation of polyynes with an odd number of conjugated triple bonds is challenging, particularly for complex architectures since most established methods rely on irreversible C–C bond‐forming reactions. To address this, we have developed the synthesis of triynes via alkyne metathesis.
Julien Escudero +12 more
wiley +2 more sources
Advanced Science, 2020 Although polycyclic conjugated hydrocarbons (PCHs) and their analogues have gained great progress in the fields of organic photoelectronic materials, the in‐depth study on present PCHs is still limited to hexacene or below because longer PCHs are ...
Wangqiao Chen +4 more
doaj +1 more source
Aromaticity of Heterocirculenes
Chemistry, 2021 This review summarizes the results on the aromaticity of a series of synthesized and hypothetical neutral heterocirculene molecules and their double charged ions.
Nataliya N. Karaush-Karmazin +2 more
doaj +1 more source
Donor–Acceptor Pentacene Analogues With Near‐Infrared Emission and Tunable Aromaticity
Angewandte Chemie, EarlyView.Air‐ and photostable heterocyclic pentacene analogues with donor and acceptor groups flanking a para‐quinodimethane core exhibit large dipole moments, narrow bandgaps, reversible redox behavior, and NIR‐I to NIR‐II absorption and emission with pronounced solvatochromism.
Krzysztof Nowak +6 more
wiley +2 more sources
Simulating the nanomechanical response of cyclooctatetraene molecules on a graphene device [PDF]
, 2018 We investigate the atomic and electronic structures of cyclooctatetraene (COT) molecules on graphene and analyze their dependence on external gate voltage using first-principles calculations.
Cohen, Marvin L. +2 more
core +3 more sources
Dihydrogen Activation by Antiaromatic Pentaarylboroles [PDF]
Journal of the American Chemical Society, 2010 Facile metal-free splitting of molecular hydrogen (H(2)) is crucial for the utilization of H(2) without the need for toxic transition-metal-based catalysts. Frustrated Lewis pairs (FLPs) are a new class of hydrogen activators wherein interactions with both a Lewis acid and a Lewis base heterolytically disrupt the hydrogen-hydrogen bond.
Fan, Cheng +4 more
openaire +3 more sources
Do All‐Metal Antiaromatic Clusters Exist? [PDF]
ChemInform, 2003 AbstractFor Abstract see ChemInform Abstract in Full Text.
Chen, Zhongfang +4 more
openaire +3 more sources
Shaping Antiaromatic π‐Systems by Metalation: Synthesis of a Bowl‐Shaped Antiaromatic Palladium Norcorrole [PDF]
Angewandte Chemie International Edition, 2017 AbstractThe synthesis of a bowl‐shaped antiaromatic molecule was achieved through the deformation of a planar antiaromatic porphyrinic π‐conjugation system by insertion of palladium into the small cavity of a metal‐free norcorrole. The bowl‐to‐bowl inversion dynamics of the antiaromatic Pd‐coordinated norcorrole was determined by variable‐temperature ...
Tsubasa Yonezawa +3 more
+8 more sources
The applicability of three-dimensional aromaticity in BiSnn- Zintl analogues [PDF]
, 2010 Three-dimensional aromaticity is shown to play a role in the stability of deltahedral Zintl clusters and here we examine the connection between aromaticity and stability.
Castleman, A. W., Jr. +5 more
core +2 more sources
The correlation theory of the chemical bond [PDF]
, 2017 The quantum mechanical description of the chemical bond is generally given in terms of delocalized bonding orbitals, or, alternatively, in terms of correlations of occupations of localised orbitals.
Barcza, Gergely +4 more
core +2 more sources