CH2=CH ONO

OjNKelVCIXONO CH ONOs), and about 20% dmitrophenylglycol dinitrate, (02N)2C6H3.CH(0N02).CH2(0N02)... 

PMR studies of the corrinoids 90, 93) have shown that the t value of the proton on the methene bridge Cio depends on the nature of the axial ligands, and that there is some correlation between the t value and the energy of the first electronic transition of the corrin ring. When Y = Bz the resonance moves to higher field in the order X = HgO < HO < CH2=CH < CHs . Finally Hill et al. (91) have shown that there is a correlation between the t value of the methyl protons in [Co(DMG)2 P 3-X] and the Hammett function of X, the t values increasing in the order X = N02 < CN < Cl Br 1 ONO < alkyls. 

Alkanes that form rings, or cycles, are called cycloalkanes. As T Figure 24.5 illustrates, cycloalkane structures are sometimes drawn as line structures, which are polygons in which each corner represents a CH2 group. This method of representation is similar to that used for benzene rings, ono (Section 8.6) (Remember from our benzene discussion that in aromatic structures each vertex represents a CH group, not a CH2 group.)... 

CisH oNO S]- f-Butyl 2-benzoylthio-l-methoxycarbonylethyl nitroxide COjCH, (CHjIjCNCHCHjSCOCsH, < ) Photochemical reaction of (QH5C0S)2 + CH2=CHC02CH3- -(CH3)3CN0/ CsH, EPR/ 295 N 1.40 H(CH) 0.26 77Sat5 74bj... 

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