Molecular R

This section concerns unsubstituted planar polyenes C H, , n even and m = n+2(l—r), r being the number of rings, i.e. 7r-sy sterns with all atoms, C and H, in a common plane. Low man on the totem pole of quantum-chemical models adequate for such polyenes (and, of course, for aromatic 7r-sy sterns) is the Hiickel (HMO) treatment2 which assumes strict orthogonality between the molecular [Pg.199]

Fujii developed a method for detecting radical species in the gas phase with the use of lithium ion attachment to chemical species. Li ions have been chosen as reactant ions, because the affinity of the species is highest among all the alkah metal ions. The author also explored some of the unique properties of Li ion attachment in mass spectrometry. This technique provides mass spectra of quasi-molecular [R + Li]+ ions formed by lithium-ion attachment to the radical species under high pressure . ... 

Mole % Pur. Ref. 3 Molecular r u Formula C4H9C1 Molecular Weight 92.569... 

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