REACTIONS OF ATOMS AND FREE RADICALS IN SOLUTION. XXXV. MIGRATION OF A METHYL GROUP IN THE REARRANGEMENT OF THE FREE DI-TERT-BUTYLCARBINYL RADICAL. THE REACTION OF DI-TERT-BUTYLCARBINYL CHLORIDE WITH A GRIGNARD REAGENT IN THE PRESENCE OF COBALTOUS BROMIDE

1954 ◽  
Vol 19 (7) ◽  
pp. 1150-1156 ◽  
Author(s):  
M. S. KHARASCH ◽  
YU CHENG LIU ◽  
W. NUDENBERG
Keyword(s):  
Free Radicals ◽  
Grignard Reagent ◽  
Methyl Group

ENDOR Studies of X-Irradiated Single Crystals of Sulphamethoxazole

1992 ◽  
Vol 47 (9) ◽  
pp. 950-954 ◽  
Author(s):  
R. Krzyminiewski ◽  
A. Lund
Keyword(s):  
Free Radicals ◽  
Hydrogen Atom ◽  
Single Crystals ◽  
Molecular Orbital ◽  
Unpaired Electron ◽  
Room Temperature ◽  
Molecular Orbital Calculations ◽  
Methyl Group ◽  
Isoxazole Ring ◽  
Spin Densities

Abstract Single crystals of sulphamethoxazole were X-irradiated at 273 K. ESR and ENDOR spectra were obtained at 100 K. The free radicals stable at room temperature are formally formed by abstraction of a hydrogen atom from the methyl group of the molecule. The unpaired electron is delocalized in the isoxazole ring. The assignment is supported by comparisons of spin densities obtained experimentally and by semiempirical molecular orbital calculations

Mechanism of Acetal Cleavage with Methylmagnesium Iodide

1985 ◽  
Vol 38 (7) ◽  
pp. 1031
Author(s):  
AD Abell ◽  
RA Massy-Westropp
Keyword(s):  
Grignard Reagent ◽  
Tertiary Alcohol ◽  
Methyl Group ◽  
Methylmagnesium Iodide ◽  
Oxygen Bond

The reaction of methylmagnesium iodide with methyl (1R,3S,5R)-1-(furan- 3′-yl)-5-methyl-2,8-dioxabicyclo[3.2.1]octane-3-carboxylate (2) gives products arising from regioselective carbon-oxygen bond fission and intermolecular transfer of the methyl group of the Grignard reagent to the intermediate oxocarbonium ion, in addition to the usual tertiary alcohol.

Use of [13C-methyl]Tropinone to follow the fate of the methyl group during calystegine formation in root cultures of Solanum dulcamara (Solanaceae)

Planta Medica ◽  
2008 ◽  
Vol 74 (09) ◽  
Author(s):  
TA Bartholomeusz ◽  
R Molinié ◽  
A Roscher ◽  
AC Freydank ◽  
B Dräger ◽  
...  
Keyword(s):  
Root Cultures ◽  
Solanum Dulcamara ◽  
Methyl Group

STRESS PADA LANSIA MENJADI FAKTOR PENYEBAB DAN AKIBAT TERJADINYA PENYAKIT

2015 ◽  
Vol 6 (2) ◽  
Author(s):  
Nur Hidaayah
Keyword(s):  
Drinking Water ◽  
Free Radicals ◽  
The Elderly ◽  
The State ◽  
Young Age ◽  
Fresh Fruit ◽  
Stress Conditions ◽  
Harmful Substances ◽  
Available Resources

Stress conditions in the elderly means an imbalance condition of biological, psychological, and social are closely related to the response to the threats and dangers faced by the elderly. Pressure or interference that is not fun is usually created when the elderly see a mismatch between the state and the 3 systems available resources. Maintenance actions that need to be done there are 2 types, namely : prevention of exposure to a stressor (precipitation factor) and serious treatment of the imbalance condition/ illness (precipitation factor). Prevention includes: sports, hobbies, friendship, avoid eating foods high in free radicals and harmful substances, sex and setting arrangements adequate rest. Habits of the above if done at a young age to avoid exposure to stress in the elderly. Treatment of the imbalance condition / illness, include : drinking water, meditation, eating fresh fruit, and adequate rest.

Magnetic properties of free radicals

1988 ◽  
Vol 155 (5) ◽  
pp. 180-180
Author(s):  
Anatolii L. Buchachenko
Keyword(s):  
Magnetic Properties ◽  
Free Radicals
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