Jaime Cornejo - Academia.edu (original) (raw)
Papers by Jaime Cornejo
Gestión ambiental de residuos tóxicos y peligrosos (y parte II)
Gestión ambiental de residuos tóxicos y peligrosos (Parte I)
Imu Ingenieria Municipal, 2006
Cornejo, JJ, Munoz, FG, Ma, CY and Stewart, AJ. 1999. Studies on the decontamination of air by plants. Ecotoxicology 8(4):311-320
Journal of the Chilean Chemical Society, 2010
We have determined the electrochemical behavior of a series of long chain 1-alkyl-3-methylimidazo... more We have determined the electrochemical behavior of a series of long chain 1-alkyl-3-methylimidazolium ionic liquids [(R-mim)BF 4 ], with alkyl groups ranging from pentyl to octyl, and tested them as electrolytes in lithium ion batteries. These ionic liquids present good conductivities and electrochemical windows which make them likely solvents of choice for Li-ion batteries using LiMn 2 O 4 as the cathode. Charge/discharge properties of a Li/ R-mim)BF 4 /LiMn 2 O 4 cell have been evaluated both with the IL as the sole electrolyte and with IL and conducting support. The Li-ion insertion results in IL can be explained on the basis of self aggregation of each long chain 1-alkyl-3-methylimidazolium cation.
![Research paper thumbnail of Benzo[e]isobenzofuran. Formation and reactions of the parent and alkoxy-substituted derivatives](https://attachments.academia-assets.com/86433803/thumbnails/1.jpg)
](The Journal of Organic Chemistry, 1983
Benzo[e]isobenzofwan (1) is formed by base-induced 1,4-elimination of either acetal 9 or 11 and m... more Benzo[e]isobenzofwan (1) is formed by base-induced 1,4-elimination of either acetal 9 or 11 and may be isolated in high yield as a crystalline solid. Cycloaddition reactions of preformed 1 have been carried out with various dienophiles. These reactions may also be accomplished by heating the acetals in the presence of dienophiles and acid catalyst, where 1 is generated as an intermediate. The cycloaddition reaction of 1 and maleic anhydride is found to be reversible at higher temperature (slow at 60 "C). Unsymmetrical dienophiles react with 1 to give equal amounts of regioisomers, and evidence points to lack of regioselectivity under both kinetically controlled and equilibrating conditions. The acetals 9 and 11 are shown to interconvert with acid catalyst at 140 O C , where 1 is an intermediate of greater stability than the acetals; the equilibrium K for 9 + 11 is approximately unity. Various acid-catalyzed cycloaddition reactions of ortho esters 8 and 10, yielding polysubstituted phenanthrene derivatives, are described. Wege has recently reported1 the synthesis of benzo[e]isobenzofuran (1, naphtho[ 1,BcIfuran) by pyrolysis2 of the corresponding (dihydro)naphthyne-furan derivative and found that it is qualitatively more stable than the parent isobenzofuran 2. Our work in this area began with a novel 1 2 3
The Journal of Organic Chemistry, 1985
for several months without noticeable decomposition or handling problems. Tetra-n-butylammonium c... more for several months without noticeable decomposition or handling problems. Tetra-n-butylammonium cyanide was purchased from Fluka and dried [60 "C (0.2 torr)] for 24 h prior to use. Solutions of this reagent were prepared in dry CH3CN. To a cold (-78 "C), stirred solution of menthol-MOM ether 8 (1 mmol) in 8.8 mL of dry CH2C12, under argon, was added a CH2C12 solution of dimethylboron bromide (1.73 M, 1.16 mL). The reaction mixture was stirred at -78 "C for 1 h and then treated with diisopropylethylamine (2.5 mmol) and a solution of methanethiol in CH2C12 (10 M, 0.3 mL). After 1 h at -78 "C the mixture was cannulated into a stirred mixture of THF (5 mL) and saturated aqueous NaHC03 (5 mL). Ether (50 mL) was then added. The organic layer was separated, washed with saturated aqueous NaHC03, water, and brine, and dried over MgS04. Removal of solvent and purification by flash chromatography gave pure
The Journal of Organic Chemistry, 1986
Synthesis of Some Novel Functionalized Monoazatricyclic Ring Systems via Intramolecular Cycloaddi... more Synthesis of Some Novel Functionalized Monoazatricyclic Ring Systems via Intramolecular Cycloaddition of N-(Bicycloalkeny1)nitrones. Page 1899. In supplementary material: the final positional parameters of C(15) in the crystal structure of 14a (Table 111) should read x l a Y l b Z I C Beq, A2 0.5075 (10) 0.6132 (10) 0.3190 (22) 10.1 (6) Stanley J. Cristol* and Ellen 0. Aeling. Photochemical Transformations. 39. Effects of Ring Substituents and Leaving Groups on Photo-Wagner-Meerwein Rearrangements and Their Ground-State Analogues. Page 2702. The designations for compounds 16 and 17 are transposed. This occurs in column 1, lines 4 and 5 from bottom, and in column 2, lines 10 and 11 of the text, as well as twice in each of the second and fourth lines of Scheme IV. Further, a CHBO group is missing from the last structural formula of Scheme IV (same location as shown in 35).
We conducted laboratory tests with six species of plants to determine their ability to remove ben... more We conducted laboratory tests with six species of plants to determine their ability to remove benzene, trichloroethylene (TCE) and toluene from air. The objective of this proof-of-principal study was to evaluate the idea that phytoremediation techniques might be used to lower the concentrations of indoor air pollutants, such as volatile or semi-volatile organic compounds. Plants were exposed to the pollutants
Free radical polymerization in the presence of triethylborane
European Polymer Journal, 1975
Abstract The polymerization of methyl methacrylate initiated by triethylborane-peroxides and by t... more Abstract The polymerization of methyl methacrylate initiated by triethylborane-peroxides and by triethylborane-AIBN mixtures has been studied. From the dependence of rate of polymerization and molecular weight of the polymer on the triethylborane concentration. It is concluded that the initiation is complex. An initiation mechanism involving triethylborane-monomer and triethylborane-cocatalyst complexes is proposed.
Gestión ambiental de residuos tóxicos y peligrosos (y parte II)
Gestión ambiental de residuos tóxicos y peligrosos (Parte I)
Imu Ingenieria Municipal, 2006
Cornejo, JJ, Munoz, FG, Ma, CY and Stewart, AJ. 1999. Studies on the decontamination of air by plants. Ecotoxicology 8(4):311-320
Journal of the Chilean Chemical Society, 2010
We have determined the electrochemical behavior of a series of long chain 1-alkyl-3-methylimidazo... more We have determined the electrochemical behavior of a series of long chain 1-alkyl-3-methylimidazolium ionic liquids [(R-mim)BF 4 ], with alkyl groups ranging from pentyl to octyl, and tested them as electrolytes in lithium ion batteries. These ionic liquids present good conductivities and electrochemical windows which make them likely solvents of choice for Li-ion batteries using LiMn 2 O 4 as the cathode. Charge/discharge properties of a Li/ R-mim)BF 4 /LiMn 2 O 4 cell have been evaluated both with the IL as the sole electrolyte and with IL and conducting support. The Li-ion insertion results in IL can be explained on the basis of self aggregation of each long chain 1-alkyl-3-methylimidazolium cation.
The Journal of Organic Chemistry, 1983
Benzo[e]isobenzofwan (1) is formed by base-induced 1,4-elimination of either acetal 9 or 11 and m... more Benzo[e]isobenzofwan (1) is formed by base-induced 1,4-elimination of either acetal 9 or 11 and may be isolated in high yield as a crystalline solid. Cycloaddition reactions of preformed 1 have been carried out with various dienophiles. These reactions may also be accomplished by heating the acetals in the presence of dienophiles and acid catalyst, where 1 is generated as an intermediate. The cycloaddition reaction of 1 and maleic anhydride is found to be reversible at higher temperature (slow at 60 "C). Unsymmetrical dienophiles react with 1 to give equal amounts of regioisomers, and evidence points to lack of regioselectivity under both kinetically controlled and equilibrating conditions. The acetals 9 and 11 are shown to interconvert with acid catalyst at 140 O C , where 1 is an intermediate of greater stability than the acetals; the equilibrium K for 9 + 11 is approximately unity. Various acid-catalyzed cycloaddition reactions of ortho esters 8 and 10, yielding polysubstituted phenanthrene derivatives, are described. Wege has recently reported1 the synthesis of benzo[e]isobenzofuran (1, naphtho[ 1,BcIfuran) by pyrolysis2 of the corresponding (dihydro)naphthyne-furan derivative and found that it is qualitatively more stable than the parent isobenzofuran 2. Our work in this area began with a novel 1 2 3
The Journal of Organic Chemistry, 1985
for several months without noticeable decomposition or handling problems. Tetra-n-butylammonium c... more for several months without noticeable decomposition or handling problems. Tetra-n-butylammonium cyanide was purchased from Fluka and dried [60 "C (0.2 torr)] for 24 h prior to use. Solutions of this reagent were prepared in dry CH3CN. To a cold (-78 "C), stirred solution of menthol-MOM ether 8 (1 mmol) in 8.8 mL of dry CH2C12, under argon, was added a CH2C12 solution of dimethylboron bromide (1.73 M, 1.16 mL). The reaction mixture was stirred at -78 "C for 1 h and then treated with diisopropylethylamine (2.5 mmol) and a solution of methanethiol in CH2C12 (10 M, 0.3 mL). After 1 h at -78 "C the mixture was cannulated into a stirred mixture of THF (5 mL) and saturated aqueous NaHC03 (5 mL). Ether (50 mL) was then added. The organic layer was separated, washed with saturated aqueous NaHC03, water, and brine, and dried over MgS04. Removal of solvent and purification by flash chromatography gave pure
The Journal of Organic Chemistry, 1986
Synthesis of Some Novel Functionalized Monoazatricyclic Ring Systems via Intramolecular Cycloaddi... more Synthesis of Some Novel Functionalized Monoazatricyclic Ring Systems via Intramolecular Cycloaddition of N-(Bicycloalkeny1)nitrones. Page 1899. In supplementary material: the final positional parameters of C(15) in the crystal structure of 14a (Table 111) should read x l a Y l b Z I C Beq, A2 0.5075 (10) 0.6132 (10) 0.3190 (22) 10.1 (6) Stanley J. Cristol* and Ellen 0. Aeling. Photochemical Transformations. 39. Effects of Ring Substituents and Leaving Groups on Photo-Wagner-Meerwein Rearrangements and Their Ground-State Analogues. Page 2702. The designations for compounds 16 and 17 are transposed. This occurs in column 1, lines 4 and 5 from bottom, and in column 2, lines 10 and 11 of the text, as well as twice in each of the second and fourth lines of Scheme IV. Further, a CHBO group is missing from the last structural formula of Scheme IV (same location as shown in 35).
We conducted laboratory tests with six species of plants to determine their ability to remove ben... more We conducted laboratory tests with six species of plants to determine their ability to remove benzene, trichloroethylene (TCE) and toluene from air. The objective of this proof-of-principal study was to evaluate the idea that phytoremediation techniques might be used to lower the concentrations of indoor air pollutants, such as volatile or semi-volatile organic compounds. Plants were exposed to the pollutants
Free radical polymerization in the presence of triethylborane
European Polymer Journal, 1975
Abstract The polymerization of methyl methacrylate initiated by triethylborane-peroxides and by t... more Abstract The polymerization of methyl methacrylate initiated by triethylborane-peroxides and by triethylborane-AIBN mixtures has been studied. From the dependence of rate of polymerization and molecular weight of the polymer on the triethylborane concentration. It is concluded that the initiation is complex. An initiation mechanism involving triethylborane-monomer and triethylborane-cocatalyst complexes is proposed.