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anionic sigma-complexes (30) 30
chemistry, multidisciplinary (16) 16
chemistry (12) 12
chemistry, organic (12) 12
meisenheimer complexes (9) 9
chemistry, physical (8) 8
1,3,5-trinitrobenzene (7) 7
nucleophilic-substitution (7) 7
regioselectivity (7) 7
molecular structure (6) 6
research (6) 6
anionic polymerization (5) 5
inorganic chemistry (5) 5
polymer science (5) 5
reactivity (5) 5
4,6-dinitrobenzofuroxan (4) 4
ambident phenoxide ion (4) 4
amines (4) 4
anionic sigma complexes (4) 4
carbanions (4) 4
chemistry, inorganic & nuclear (4) 4
chemistry/food science, general (4) 4
derivatives (4) 4
dimethyl-sulfoxide (4) 4
gas-phase (4) 4
ions (4) 4
mechanism (4) 4
microstructure (4) 4
nmr (4) 4
nuclear magnetic resonance (4) 4
nuclear magnetic-resonance (4) 4
nucleophilic aromatic-substitution (4) 4
polybutadiene (4) 4
surface active agents (4) 4
1,3,5-trisbenzene (3) 3
2,4,6-trinitrobenzene (3) 3
anionic sigma-adducts (3) 3
anionic sigma-complex (3) 3
arenes (3) 3
aromatic compounds (3) 3
crystal structure (3) 3
diffraction (3) 3
hydrogen (3) 3
hydroxide ion (3) 3
limiting proton-transfer (3) 3
meisenheimer complex (3) 3
methoxide (3) 3
physical chemistry (3) 3
super-electrophiles (3) 3
x-ray diffraction study (3) 3
5,7-dinitroquinoline (2) 2
5-nitropyrimidine (2) 2
adduct (2) 2
adduct formation (2) 2
aliphatic-amines (2) 2
am1 (2) 2
anionic σ-complex (2) 2
anionic σ-complexes (2) 2
aqueous-solution (2) 2
aromatic nitro-compounds (2) 2
aromatic nucleophilic addition (2) 2
aromatic nucleophilic substitution (2) 2
aromatic-compounds (2) 2
aromatic-substitution reactions (2) 2
butadiene (2) 2
chemical reactions (2) 2
chemistry, analytical (2) 2
crystal-structure (2) 2
crystallography (2) 2
deficient aromatics (2) 2
density (2) 2
dimethylsulfoxide (2) 2
electrons (2) 2
high-vinyl polybutadiene (2) 2
ir (2) 2
lewis base (2) 2
lithium (2) 2
mass spectrometry (2) 2
organic chemistry (2) 2
organic compounds (2) 2
oxidation (2) 2
oxygen (2) 2
photodissociation (2) 2
physics, atomic, molecular & chemical (2) 2
polybutadienes (2) 2
secondary-amines (2) 2
spectra (2) 2
spectroscopy (2) 2
structure elucidation (2) 2
substitution (2) 2
sulfonyl fluorides (2) 2
system (2) 2
temperature (2) 2
transformations (2) 2
trifluoromethylation (2) 2
x-ray diffraction analysis (2) 2
x-rays (2) 2
1,3,5-trinitrobenzene-phenoxide sigma-complex (1) 1
1,3-dimethyl barbituric acid (1) 1
1,4-disubstituted 2,3-dinitro-1,3-butadienes (1) 1
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Chemistry – A European Journal, ISSN 0947-6539, 06/2015, Volume 21, Issue 23, pp. 8355 - 8359
Journal Article
TETRAHEDRON LETTERS, ISSN 0040-4039, 04/2008, Volume 49, Issue 17, pp. 2719 - 2721
.... Its reactions with sodium sulfite, morpholine and carbanions of malonic and acetoacetic esters, dimedone and nitromethane lead to the formation of comparatively stable anionic sigma-complexes 3-8. (c... 
OXIDATION | SULFONYL FLUORIDES | NUCLEOPHILIC-SUBSTITUTION | CHEMISTRY, ORGANIC | CARBANIONS | AROMATIC-COMPOUNDS | MEISENHEIMER COMPLEXES | C-13 | aromatic sulfonic-acid fluorides | 1,3,5-TRIS(TRIFLUOROMETHYLSULFONYL)BENZENE | aromatic nucleophilic addition | FLUORINE-CONTAINING SUBSTITUENTS | NUCLEAR MAGNETIC-RESONANCE | anionic sigma-complexes | 1,3,5-Tris(fluorosulfonyl)benzene
Journal Article
Acta crystallographica. Section E, Structure reports online, ISSN 1600-5368, 2014, Volume 70, Issue 10, pp. o1102 - o1103
The asymmetric unit of the title molecular salt, C H N ·C H N O [alternative name: trimethylammonium 5-(2,4-dinitrophenyl)-1,3-dimethyl barbiturate], contains... 
crystal structure | barbiturates | tetrahydropyrimidin-4-olate salt | biological activity | trimethylammonium salt | anionic σ-complexes | trimethyl-ammonium salt | CRYSTALLOGRAPHY | anionic sigma-complexes
Journal Article
Journal of Thermal Analysis and Calorimetry, ISSN 1388-6150, 11/2016, Volume 126, Issue 2, pp. 681 - 688
Journal Article
JOURNAL OF FLUORINE CHEMISTRY, ISSN 0022-1139, 12/2010, Volume 131, Issue 12, pp. 1344 - 1352
Journal Article
Chemical communications (Cambridge, England), ISSN 1359-7345, 2017, Volume 53, Issue 95, pp. 12734 - 12737
The addition of phenyl lithium (PhLi) to an aromatic 1,3,2,5-diazadiborinine ( afforded isolable ionic species , which can be deemed as an inorganic analogue... 
DIMETALLOBORYLENE COMPLEX | MEISENHEIMER COMPLEXES | HYDROGEN | BORYL ANION | REDUCTION | STRUCTURAL CHEMISTRY | REACTIVITY | CHEMISTRY, MULTIDISCIPLINARY | BORYLLITHIUM | AROMATIC-SUBSTITUTION REACTIONS | ANIONIC SIGMA-COMPLEXES | Gold | Lithium | Boron | Diffraction
Journal Article
International Journal of Mass Spectrometry, ISSN 1387-3806, 07/2017, Volume 418, pp. 173 - 179
Journal Article
Angewandte Chemie International Edition, ISSN 1433-7851, 03/2007, Volume 46, Issue 12, pp. 1995 - 1998
Journal Article
Journal of the American Chemical Society, ISSN 0002-7863, 08/2011, Volume 133, Issue 32, pp. 12858 - 12865
Journal Article
Journal of Fluorine Chemistry, ISSN 0022-1139, 2010, Volume 131, Issue 2, pp. 248 - 253
Journal Article
JOURNAL OF MOLECULAR STRUCTURE, ISSN 0022-2860, 03/2000, Volume 520, pp. 141 - 153
.... The dihydrocycle is found to possess high conformational flexibility in all anionic sigma-complexes considered... 
SYSTEM | X-ray diffraction study | AM1 | AMl calculations | NUCLEOPHILIC-SUBSTITUTION | CHEMISTRY, PHYSICAL | derivatives of 5,7-dinitroquinoline | conformational flexibility | molecular structure | ADDUCT FORMATION | CYCLES | anionic sigma-complexes | HYDROXIDE ION
Journal Article
Journal of fluorine chemistry, ISSN 0022-1139, 2011, Volume 132, Issue 12, pp. 1219 - 1226
Convenient and preparative synthetic procedures of 2,4,6-tris(chlorosulfonyl)- and 2,4,6-tris(fluorosulfonyl)phenol, -chlorobenzene and -aniline have been... 
Arenes | Synthetic methods | Sulfonylchlorides | Nucleophilic substitution | Sulfonylfluorides | Molecular structures | CHEMISTRY, ORGANIC | CHEMISTRY, INORGANIC & NUCLEAR | AROMATIC SULFONYL FLUORIDES | CHLORIDES | METAL PICRATES | DERIVATIVES | ANIONIC SIGMA-COMPLEXES
Journal Article
JOURNAL OF MOLECULAR LIQUIDS, ISSN 0167-7322, 04/2001, Volume 91, Issue 1-3, pp. 115 - 122
The structure of ions and ion pairs of Meisenheimer and Janovsky sigma -complexes of 1,3,5-trinitrobenzene has been studied by derivative spectroscopy and semiempirical quantum chemical PM3 and CNDO/S methods... 
molecular structure | derivative spectroscopy | electronic absorption spectra | semiempirical quantum chemical method | PHYSICS, ATOMIC, MOLECULAR & CHEMICAL | ion pair | anionic sigma-complex
Journal Article
Journal of Electroanalytical Chemistry, ISSN 1572-6657, 2008, Volume 615, Issue 1, pp. 12 - 18
The first electropolymerization of a Meisenheimer σ-complex of indole with 2,4,7-trinitro-9-fluorenone (TNF) has been reported. Linear sweep voltammetry and... 
Trinitrofluorenone | Conducting polymer | Indole | Meisenheimer complex | Electropolymerization | Polyindole | ELECTROCHEMISTRY | CHEMISTRY, ANALYTICAL | indole | MECHANISM | PYRROLE | WORK FUNCTION | BEHAVIOR | meisenheimer complex | electropolymerization | RAMAN | POLY(5-CYANOINDOLE) | POLYCARBAZOLE | trinitrofluorenone | conducting polymer | polyindole | DERIVATIVES | ANIONIC SIGMA-COMPLEXES
Journal Article
RUSSIAN CHEMICAL BULLETIN, ISSN 1066-5285, 03/1998, Volume 47, Issue 3, pp. 423 - 428
... to a substantial contribution of the aci form to the structure of the nitro group. Quantum-chemical calculations of anionic sigma-complexes of 9-nitroanthracene derivatives were performed... 
molecular structure | AM1 | CRYSTAL-STRUCTURE | semiempirical quantum-chemical AM1 method | 9-nitroanthracene, anionic sigma-complexes | conformational analysis | CHEMISTRY, MULTIDISCIPLINARY | X-ray diffraction analysis | HYDROXIDE ION
Journal Article
RUSSIAN CHEMICAL BULLETIN, ISSN 1066-5285, 11/1998, Volume 47, Issue 11, pp. 2074 - 2077
The molecular structures of anionic sigma-complexes of 9-nitroanthracene and its 10-methoxy and 10-acetonyl derivatives were calculated by the ab initio quantum-chemical HF/6-31G** method... 
molecular structure | SYSTEM | ab initio calculations | MECHANISM | RINGS | NUCLEOPHILIC-SUBSTITUTION | 9-nitroanthracene | GAS-PHASE | charge distribution | anionic sigma-complexes | REGIOSELECTIVITY | CHEMISTRY, MULTIDISCIPLINARY
Journal Article
JOURNAL OF PHYSICAL CHEMISTRY A, ISSN 1089-5639, 09/2002, Volume 106, Issue 35, pp. 8109 - 8116
...** calculations has been carried out as well for comparison. It was shown that potassium cations coordinated with sigma-complex in these crystals considerably affect the charge density distribution... 
SUBSTITUTION | 4,6-DINITROBENZOFUROXAN | CHEMISTRY, PHYSICAL | REGIOSELECTIVITY | ANIONIC SIGMA-COMPLEXES
Journal Article
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