44. Unstable intermediates. Part XIV. The formyl radical

Brivati, J. A.; Keen, N.J.; Symons, Martyn C. R.

doi:10.1039/jr9620000237

Cited by 36 publications

(16 citation statements)

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“…The unusually large isotropic proton splitting is almost identical with that for HCO which has been discussed by various authors [3][4][5], the unpaired electron being formally in a non-bonded molecular orbital on carbon and oxygen, but with considerable delocalization onto the proton. We therefore suggest that radical I is the iso-electronic species HCN-, and the following considerations are offered in support of this postulate.…”

Section: Discussionmentioning

confidence: 68%

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Electron spin resonance spectrum of HCN⁻in alkali halide matrices

1966

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The electron spin resonance spectrum of a radical formed by ),-irradiation or ultra-violet photolysis of alkali halides doped with cyanide shows a very large hyperfine coupling to one proton (Aiso It= 137 gauss) and one carbon atom (Aiso c = 74 gauss). In addition a single nitrogen atom gives a triplet having a AisoS;=6'5 gauss. The radical is identified as HCN-and its electronic structure is discussed. A second radical also containing a single strongly coupled proton has been detected and is briefly discussed.

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Section: Discussionmentioning

confidence: 68%

“…Amongst many radical species found, one consisting of a major doublet with hyperfine splitting of 137 gauss has been studied in detail and the aim of this work is to show that this is best identified as HCN-. Other radicals of this type previously studied include H2CN [2], and HCO [3,4].…”

Section: Introductionmentioning

confidence: 97%

Electron spin resonance spectrum of HCN⁻in alkali halide matrices

1966

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“…The organic radicals include the families HCN" + HCO (23,24), H 2 CN + H 2 CO + (25,26) and R(H)CN + R(H)CO + (27,28) all showing 'H splittings in the region of 100 G. I now think that I have unearthed some features for H 2 + -but that's yet another story.…”

Section: Radicals With Large 'H Hyperfine Couplingmentioning

confidence: 89%

“…In addition to getting H 2 C OH radicals and trapped electrons as expected, we were surprised to detect an anisotropic 130 G doublet. Using CD 3 OH showed that the doublet splitting came from a methyl proton, but at that time all known proton splittings in organic radicals were < 26 G. It seemed that H-C O was a likely candidate, but it took me ages to realize that this is a bent molecule, and hence that there was direct overlap involving the Is hydrogen orbital, giving a high spindensity therein (24).…”

Section: Radicals With Large 'H Hyperfine Couplingmentioning

confidence: 97%

Radicals I Have Loved: I - Organic Free Radicals

Symons¹

1998

Foundations of Modern EPR

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“…Another possibility for the assignment of this doublet is the formyl radical. The characteristics of the spectrum described above correspond to those found in a large amount of data available in the literature (20)(21)(22)(23)(24)(25)(26)(27)(28) and ascribed to that radical species. The two BB' lines, (Figs.…”

Section: Assignment Of the Aa' Doubletmentioning

confidence: 93%