Butyl methylseleno

Lithium butyltelluroselenolate is methylated by methyl trifluoromethanesulfonate. The butyl methylseleno tellurium is in equilibrium with dibutyl ditellurium and dimethyl diselenium2. 

Methylselenoxy analogs are even more difficult to react and treatment of the corresponding methylseleno derivative at 80 °C with terf-butyl hydroperoxide/basic alumina (conditions which proved particularly efficient for the synthesis of terminal olefins from methyl selenides bearing a methylseleno group at the terminus of the alkyl chain 7,8,12>, which are more difficult to react) as expected 140) does not lead 35) to the desired alkylidene cyclopropanes but to low yields of cyclobutanones resulting probably from the well-known 140) reaction of rert-butyl hydroperoxide with the alkylidene cyclopropane formed transiently35). 

CijHigNOSe] t-Butyl a-(methylseleno)benzyl nitroxide SeCH, i (CH3)3CNCHC6Hs o- Photochemical reaction of (CH3)2Se + CH3)3CNnO-)CHC6H5/ C5H13 EPR/ 223 2.0097 N 1.35 H(CH) 0.206 HlCHj) 0.085 77Scal... 

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