Results 281 to 290 of about 443,970 (323)

π-Hydrogen bonding and aromaticity: a systematic interplay study.

Physical Chemistry, Chemical Physics - PCCP, 2019
Quantum DFT calculations, corrected for long-range interactions, have been carried out on complex models formed between HF as a proton donor and 2-methylene-2H-indene derivatives as proton acceptors.
A. Nekoei, M. Vatanparast
semanticscholar   +1 more source

Polynuclear aromatic hydrocarbons

Environmental Science & Technology, 1981
Polynuclear aromatic hydrocarbons (PAHs) can enter the environment in several ways, primarily through the incomplete combustion of carbonaceous materials or through processes that convert coal into synthetic fuels. Other sources of PAHs include the manufacture of carbon black, creosote, soot, vehicular emissions (especially diesel), residual oil, and ...
openaire   +2 more sources

Aromaticity and Electrophilic Aromatic Substitution

1977
The meaning of the word aromaticity has evolved as understanding of the reason for the special properties of benzene and other aromatic molecules has deepened. Originally, aromaticity was associated with a special chemical reactivity.1 The aromatic hydrocarbons were considered to be those unsaturated systems that underwent substitution reactions in ...
Francis A. Carey, Richard J. Sundberg
openaire   +1 more source

3D global aromaticity in a fully conjugated diradicaloid cage at different oxidation states

Nature Chemistry, 2020
Y. Ni, Tullimilli Y. Gopalakrishna, Hoa Phan, Taeyeon Kim, T. Herng, Yi Han, T. Tao, J. Ding, Dongho Kim, Jishan Wu   +9 more
semanticscholar   +1 more source

Nucleus-Independent Chemical Shifts:  A Simple and Efficient Aromaticity Probe.

Journal of the American Chemical Society, 1996
P. Schleyer, C. Maerker, A. Dransfeld, H. Jiao, N. van Eikema Hommes   +4 more
semanticscholar   +1 more source

Nucleus-independent chemical shifts (NICS) as an aromaticity criterion.

Chemical Reviews, 2005
Zhongfang Chen, C. Wannere, C. Corminboeuf, R. Puchta, P. Schleyer   +4 more
semanticscholar   +1 more source

Spectrofluorometric characterization of dissolved organic matter for indication of precursor organic material and aromaticity

, 2001
D. McKnight, E. Boyer, P. Westerhoff, P. Doran, T. Kulbe, D. Andersen   +5 more
semanticscholar   +1 more source

Aromatic Metamorphosis: Skeletal Editing of Aromatic Rings

Accounts of Chemical Research
ConspectusAromatic rings are fundamental structural motifs found in natural products, synthetic intermediates, pharmaceuticals, agrochemicals, and functional materials. While transformations at the periphery of these rings are well-established, modifying their core frameworks has remained an underexplored frontier.
openaire   +2 more sources

Chemistry of meso-Aryl-Substituted Expanded Porphyrins: Aromaticity and Molecular Twist.

Chemical Reviews, 2017
Takayuki Tanaka, A. Osuka
semanticscholar   +1 more source

Aromatic Cyclodehydration.

Chemical Reviews, 1946
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