The electron spin resonance spectra of radicals obtained by the addition of amino and hydroxyl radicals to alkenes

Dewing, J.; Longster, G. F.; Myatt, J.; Todd, P. F.

doi:10.1039/c1965000391b

Cited by 6 publications

(3 citation statements)

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“…5(B)), showed the 22 f 1 G quintet but with a 5 or 6 G quartet splitting superimposed. These features are not characteristic of CH,CH,NH,, the isotropic h.f. parameters of which are known (6). This radical would be expected to have two inequivalent P protons in solids at low temperatures similar to those observed in (isoelectronic) CH,CH,CH, (7).…”

Section: (I) Glassy Methylamine ( + 10% H20)mentioning

confidence: 61%

“…The absence of spectra attributable to c H 2 -CH2NH2 in irradiated C2H5NH2 results from the almost negligible reactivity of the methyl protons both in ion-molecule reactions similar to [I] (19), and also in attack by methyl radicals (18). In contrast, reaction of the Ti3+/H202 system with C2H5NH2 in acid solution produces the ~H,CH,NH, radical (6).…”

Section: Discussion (I) Formation Of the Radicalsmentioning

confidence: 99%

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Electron Spin Resonance Studies of the Radiolysis of Aliphatic Amines at 77 °K

Wardman¹,

Smith²

1971

Can. J. Chem.

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Several frozen aliphatic amines have been γ-irradiated at 77 °K and the electron spin resonance (e.s.r.) spectra of the trapped radicals obtained at 77 °K and on warming. Radiolysis of methyl, ethyl and isopropyl amines produces predominantly alkylamino [Formula: see text] radicals. The proton hyperfine (h.f.) couplings of [Formula: see text] radicals are 10–30% larger than those in the corresponding isoelectronic alkyl radicals and the parallel component of the 14N coupling is about 35 G. Restricted rotation of alkyl groups occurs at 77 °K in some cases. On warming from 77 °K, the [Formula: see text] radicals generally abstract from the solvent or isomerize to produce radicals of the aminoalkyl type (e.g. RĊHNH2). The alkyl proton h.f. splittings of these latter radicals are 20–40% lower than in the corresponding alkyl radicals, and the observed 14N coupling was [Formula: see text] in ĊH2NR2 and [Formula: see text] in (CH3)2ĊNH2 and CH3ĊHNH2. The amino proton couplings in the aminoalkyl radicals were not resolved. Irradiated dimethylamine produces both (CH3)2N and CH2N(CH3) radicals, but (CH3)2N disappears on warming. Only ĊH2N(CH3)2 was observed after irradiation of (CH3)3N at 77 °K. Solid methoxyamine (giving CH3ONH) and tert-butyl-amine were also studied.

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Section: (I) Glassy Methylamine ( + 10% H20)mentioning

confidence: 61%

Section: Discussion (I) Formation Of the Radicalsmentioning

confidence: 99%

Electron Spin Resonance Studies of the Radiolysis of Aliphatic Amines at 77 °K

Wardman¹,

Smith²

1971

Can. J. Chem.

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“…(CH3)2SnH2 -> (CH3)2SnH + H (13) Photolysis of tetraalkyl-(methyl, ethyl, and «-propyl) tin compounds produces free radicals according to the scheme39•46 shown in eq [14][15][16]. Unpublished work of R4Sn -f-hv > R3Sn* -f-R• (14) 2R3Sn--> R3SnSnR3 Luijten and van der Kerk42 on the uv irradiation of tetraalkyl tin compounds in air indicates decomposition to triand dialkyltin compounds.…”

Section: Discussionmentioning

confidence: 99%

Detection and identification of short-lived free radicals by electron spin resonance trapping techniques (spin trapping). Photolysis of organolead, -tin, and -mercury compounds

Janzen¹,

Blackburn²

1969

J. Am. Chem. Soc.

290

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Elektronenspinresonanz kurzlebiger Radikale aus einigen Aminosäuren und Amiden

Paul

Fischer

1969

Ber Bunsenges Phys Chem

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Kohlenstoffradikale werden in wäßriger Lösung aus Aminosäuren und Amiden erzeugt und durch Elektronenspinresonanz nachgewiesen. Die Struktur der aus Aminosäuren gebildeten Radikale hängt vom pH‐Wert der Lösungen ab. Aus den Aufspaltungsparametern von Radikalen vom Typ folgt, daß diese Radikale vermutlich nichtebene Bindungsstrukturen besitzen. Radikale vom Typ sind dagegen wahrscheinlich eben. Eine Berechnung von Spinpopulationen in diesen Radikalen gestattet, aus den Aufspaltungsparametern der Stickstoffatome die Polarisationskonstante Q zu −3,3 G ≤ Q ≤ −2,3 G abzuschätzen.

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The electron spin resonance spectra of radicals obtained by the addition of amino and hydroxyl radicals to alkenes

Cited by 6 publications

References 0 publications

Electron Spin Resonance Studies of the Radiolysis of Aliphatic Amines at 77 °K

Electron Spin Resonance Studies of the Radiolysis of Aliphatic Amines at 77 °K

Detection and identification of short-lived free radicals by electron spin resonance trapping techniques (spin trapping). Photolysis of organolead, -tin, and -mercury compounds

Elektronenspinresonanz kurzlebiger Radikale aus einigen Aminosäuren und Amiden

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