The Experts below are selected from a list of 183 Experts worldwide ranked by ideXlab platform
Joel S. Miller - One of the best experts on this subject based on the ideXlab platform.
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structure and magnetic ordering of a 2 d mnii tcne i oh2 tcne Tetracyanoethylene organic based magnet tc 171 k
Chemical Communications, 2011Co-Authors: Saul H Lapidus, Amber C Mcconnell, Peter W Stephens, Joel S. MillerAbstract:MnII(TCNE)I(OH2) was isolated from the reaction of Tetracyanoethylene (TCNE) and MnI2(THF)3, and has a 2-D structure possessing an unusual, asymmetric bonded μ4-[TCNE]˙−. Direct antiferromagnetic coupling between the S = 5/2 MnII and S = 1/2 [TCNE]˙− leads to magnetic ordering as a canted antiferrimagnet at a Tc of 171 K.
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Tetracyanoethylene-based organic magnets
Chemical Communications, 1998Co-Authors: Joel S. Miller, Arthur J. EpsteinAbstract:Paper Chem. Commun., 1998, 1319 - 1325, DOI: 10.1039/a800922h Tetracyanoethylene-based organic magnets Joel S. Miller and Arthur J. Epstein Several classes of organic magnets based upon the tetracyanoethenide radical anion, [TCNE].–, either unbound, µ, and µ4 bonded to zero, two and four metal sites have been reported. The putative µ4 bonded V(TCNE)x room temperature magnet has been extended to include M(TCNE)x (M = Mn, Fe, Co, Ni) magnets. M for this class of magnets is assigned to be in the divalent oxidation state. A -[TCNE]22– dimer intermediate has been isolated. The intrachain magnetic coupling for the 1-D coordination polymers having [TCNE].– µ-bridge bonded to [MnIIIporphyrins]+ is discussed in the context of a structure–function correlation arising from the dihedral angle between the [MnIIITPP]+s MnN4 and [TCNE].– mean planes and the magnitude of magnetic coupling. This correlation is ascribed to the increasing importance of the -MnIII dz2/[TCNE].– pz overlap with decreasing dihedral angle.
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Tetracyanoethylene based organic magnets
Chemical Communications, 1998Co-Authors: Joel S. Miller, Arthur J. EpsteinAbstract:Several classes of organic magnets based upon the tetracyanoethenide radical anion, [TCNE].–, either unbound, µ, and µ4 bonded to zero, two and four metal sites have been reported. The putative µ4 bonded V(TCNE)x room temperature magnet has been extended to include M(TCNE)x (M = Mn, Fe, Co, Ni) magnets. M for this class of magnets is assigned to be in the divalent oxidation state. A σ-[TCNE]22– dimer intermediate has been isolated. The intrachain magnetic coupling for the 1-D coordination polymers having [TCNE].– µ-bridge bonded to [MnIIIporphyrins]+ is discussed in the context of a structure–function correlation arising from the dihedral angle between the [MnIIITPP]+’s MnN4 and [TCNE].– mean planes and the magnitude of magnetic coupling. This correlation is ascribed to the increasing importance of the σ-MnIII dz2/[TCNE].– pz overlap with decreasing dihedral angle.
Arthur J. Epstein - One of the best experts on this subject based on the ideXlab platform.
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Tetracyanoethylene-based organic magnets
Chemical Communications, 1998Co-Authors: Joel S. Miller, Arthur J. EpsteinAbstract:Paper Chem. Commun., 1998, 1319 - 1325, DOI: 10.1039/a800922h Tetracyanoethylene-based organic magnets Joel S. Miller and Arthur J. Epstein Several classes of organic magnets based upon the tetracyanoethenide radical anion, [TCNE].–, either unbound, µ, and µ4 bonded to zero, two and four metal sites have been reported. The putative µ4 bonded V(TCNE)x room temperature magnet has been extended to include M(TCNE)x (M = Mn, Fe, Co, Ni) magnets. M for this class of magnets is assigned to be in the divalent oxidation state. A -[TCNE]22– dimer intermediate has been isolated. The intrachain magnetic coupling for the 1-D coordination polymers having [TCNE].– µ-bridge bonded to [MnIIIporphyrins]+ is discussed in the context of a structure–function correlation arising from the dihedral angle between the [MnIIITPP]+s MnN4 and [TCNE].– mean planes and the magnitude of magnetic coupling. This correlation is ascribed to the increasing importance of the -MnIII dz2/[TCNE].– pz overlap with decreasing dihedral angle.
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Tetracyanoethylene based organic magnets
Chemical Communications, 1998Co-Authors: Joel S. Miller, Arthur J. EpsteinAbstract:Several classes of organic magnets based upon the tetracyanoethenide radical anion, [TCNE].–, either unbound, µ, and µ4 bonded to zero, two and four metal sites have been reported. The putative µ4 bonded V(TCNE)x room temperature magnet has been extended to include M(TCNE)x (M = Mn, Fe, Co, Ni) magnets. M for this class of magnets is assigned to be in the divalent oxidation state. A σ-[TCNE]22– dimer intermediate has been isolated. The intrachain magnetic coupling for the 1-D coordination polymers having [TCNE].– µ-bridge bonded to [MnIIIporphyrins]+ is discussed in the context of a structure–function correlation arising from the dihedral angle between the [MnIIITPP]+’s MnN4 and [TCNE].– mean planes and the magnitude of magnetic coupling. This correlation is ascribed to the increasing importance of the σ-MnIII dz2/[TCNE].– pz overlap with decreasing dihedral angle.
Anne B Myers - One of the best experts on this subject based on the ideXlab platform.
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mode specific vibrational reorganization energies accompanying photoinduced electron transfer in the hexamethylbenzene Tetracyanoethylene charge transfer complex
Journal of the American Chemical Society, 1992Co-Authors: Frances Markel, Nancy S Ferris, Ian R Gould, Anne B MyersAbstract:Resonance Raman excitation profiles have been measured across the broad, intense charge-transfer absorption band of the hexamethylbenzene/Tetracyanoethylene complex in CCl 4 solution. Nonresonant Raman spectra of the complex and its perdeuterated derivative in the solid state have also been obtained with excitation at 1064 nm. Absorption of light within the charge-transfer band results in electron transfer from hexamethylbenzene to Tetracyanoethylene to form a radical-ion pair
O. E. Nasakin - One of the best experts on this subject based on the ideXlab platform.
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Antimicrobial activity of polycyano-substituted carboand heterocycles based on Tetracyanoethylene
Pharmaceutical Chemistry Journal, 2009Co-Authors: V P Sheverdov, O. E. Nasakin, O V Ershov, A. N. ChernushkinAbstract:The antimicrobial activity of a series of polycyano-containing carbo- and heterocycles based on Tetracyanoethylene has been studied. The most active compounds contain a 1,1,2,2,-tetracyanoethyl fragment.
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interaction of Tetracyanoethylene with α β unsaturated aldehydes synthesis of 2 4 dialkyl 7 imino 6 oxabicyclo 3 2 1 oct 3 ene 1 8 8 tricarbonitriles
Tetrahedron Letters, 2007Co-Authors: O V Ershov, O. E. Nasakin, V A Tafeenko, A V Eremkin, Ya S Kajukov, E V NurievaAbstract:Abstract The reaction of Tetracyanoethylene with α,β-unsaturated aldehydes under hydrochloric acid catalysis leads to 2,4-dialkyl-7-imino-6-oxabicyclo[3.2.1]oct-3-ene-1,8,8-tricarbonitriles. The structures of these new cyclohexene derivatives were determined by NMR experiments and X-ray crystallography.
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synthesis of 2 halo 6 hydroxy 5 5 dimethyl ethyl 5 6 dihydro 1h pyridine 3 4 4 tricarbonitriles by the reaction of Tetracyanoethylene with aldehydes
Mendeleev Communications, 2006Co-Authors: A V Eremkin, O. E. Nasakin, O V Ershov, V A Tafeenko, S N Molkov, Yakov S Kayukov, E V NurievaAbstract:The reaction of Tetracyanoethylene and isobutyraldehyde or 2-ethylbutanal in an excess of a hydrohalogen acid yields 2-halo-6-hydroxy-5,5-dimethyl(ethyl)-5,6-dihydro-3,4,4(1 H )-pyridinetricarbonitriles, the crystal and molecular structures of which were characterised by IR, NMR, MS and X-ray analysis.
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reaction of Tetracyanoethylene with 2 substituted cyclohexanones
Russian Journal of Organic Chemistry, 2002Co-Authors: V P Sheverdov, O. E. Nasakin, A. N. Chernushkin, O V Ershov, V A TafeenkoAbstract:Reactions of 2-methylcyclohexanone and menthone with Tetracyanoethylene gave 2-(1,1,2,2-tetracyanoethyl)cyclohexanones which underwent quantitative transformation in the solid phase into 3,4-cyanosubstituted 2-aminopyrans in 2-3 days at room temperature. 2-Methyl-2-(1,1,2,2-tetracyanoethyl)cyclohexanone reacted with hydroiodic acid to afford 8a-hydroxy-2-iodo-4a-methyl-1,4,4a,5,6,7,8,8a-octahydroquinoline-3,4,4-tricarbonitrile. The reaction of 2,2'-methylenedi(cyclohexanone) with Tetracyanoethylene resulted in formation of 7-imino-4,5-tetramethylene-2'-oxo-6-oxabicyclo[3.2.1]octane-2-spiro-1'-cyclohexane-1,8,8-tricarbonitrile.
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Reaction of Tetracyanoethylene with 1,2-Cyclohexanedione and Bis(cyclohexanon-2-yl)methane
ChemInform, 2001Co-Authors: Vladimir P. Sheverdov, Oleg V. Ershov, O. E. Nasakin, A. N. Chernushkin, Viktor A. Tafeenko, V. V. BulkinAbstract:The first study on reactions between Tetracyanoethylene and carbonyl compounds was published in 1957 [1]. We extended the investigations in this field and established that the arising b,b,g,g-tetracyanoalkanones were very reactive [2, 3]. However in this process were involved only some b-dicarbonyl compounds whose addition to Tetracyanoethylene followed by cyclization due to interactions NH^CN and OH^CN resulted in formation of pyrroles, furans, and pyrans [4].
O V Ershov - One of the best experts on this subject based on the ideXlab platform.
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Antimicrobial activity of polycyano-substituted carboand heterocycles based on Tetracyanoethylene
Pharmaceutical Chemistry Journal, 2009Co-Authors: V P Sheverdov, O. E. Nasakin, O V Ershov, A. N. ChernushkinAbstract:The antimicrobial activity of a series of polycyano-containing carbo- and heterocycles based on Tetracyanoethylene has been studied. The most active compounds contain a 1,1,2,2,-tetracyanoethyl fragment.
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interaction of Tetracyanoethylene with α β unsaturated aldehydes synthesis of 2 4 dialkyl 7 imino 6 oxabicyclo 3 2 1 oct 3 ene 1 8 8 tricarbonitriles
Tetrahedron Letters, 2007Co-Authors: O V Ershov, O. E. Nasakin, V A Tafeenko, A V Eremkin, Ya S Kajukov, E V NurievaAbstract:Abstract The reaction of Tetracyanoethylene with α,β-unsaturated aldehydes under hydrochloric acid catalysis leads to 2,4-dialkyl-7-imino-6-oxabicyclo[3.2.1]oct-3-ene-1,8,8-tricarbonitriles. The structures of these new cyclohexene derivatives were determined by NMR experiments and X-ray crystallography.
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synthesis of 2 halo 6 hydroxy 5 5 dimethyl ethyl 5 6 dihydro 1h pyridine 3 4 4 tricarbonitriles by the reaction of Tetracyanoethylene with aldehydes
Mendeleev Communications, 2006Co-Authors: A V Eremkin, O. E. Nasakin, O V Ershov, V A Tafeenko, S N Molkov, Yakov S Kayukov, E V NurievaAbstract:The reaction of Tetracyanoethylene and isobutyraldehyde or 2-ethylbutanal in an excess of a hydrohalogen acid yields 2-halo-6-hydroxy-5,5-dimethyl(ethyl)-5,6-dihydro-3,4,4(1 H )-pyridinetricarbonitriles, the crystal and molecular structures of which were characterised by IR, NMR, MS and X-ray analysis.
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reaction of Tetracyanoethylene with 2 substituted cyclohexanones
Russian Journal of Organic Chemistry, 2002Co-Authors: V P Sheverdov, O. E. Nasakin, A. N. Chernushkin, O V Ershov, V A TafeenkoAbstract:Reactions of 2-methylcyclohexanone and menthone with Tetracyanoethylene gave 2-(1,1,2,2-tetracyanoethyl)cyclohexanones which underwent quantitative transformation in the solid phase into 3,4-cyanosubstituted 2-aminopyrans in 2-3 days at room temperature. 2-Methyl-2-(1,1,2,2-tetracyanoethyl)cyclohexanone reacted with hydroiodic acid to afford 8a-hydroxy-2-iodo-4a-methyl-1,4,4a,5,6,7,8,8a-octahydroquinoline-3,4,4-tricarbonitrile. The reaction of 2,2'-methylenedi(cyclohexanone) with Tetracyanoethylene resulted in formation of 7-imino-4,5-tetramethylene-2'-oxo-6-oxabicyclo[3.2.1]octane-2-spiro-1'-cyclohexane-1,8,8-tricarbonitrile.
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reaction of α β unsaturated ketones with Tetracyanoethylene
Tetrahedron, 2001Co-Authors: V P Sheverdov, O. E. Nasakin, A. N. Chernushkin, O V Ershov, V A Tafeenko, S I FirgangAbstract:Reaction of Tetracyanoethylene with α,β-unsaturated ketones was investigated. 3-R 1 -4-R 2 -6-R 3 -5-oxo-1,1,2,2-cyclohexanetetracarbonitriles, unsaturated tetracyanoalkanones, 3-R-5,5-dihydroxy-1,1,2,2-cyclohexanetetracarbonitriles, 1,2,2-tricyano-3-R-5-oxo-1-cyclohexanecarboxamides, 3-R 1 -4-R 2 -8-R 3 -5-hydroxy-7-oxo-6-azabicyclo[3.2.1]octane-1,2,2-tricarbonitriles were synthesized.
