2-(4-叠氮苯基)-4,4,5,5-四甲基-4,5-二氢-1 H-咪唑-3-氧化物-1-氧基(14),2-(4-叠氮苯基)苯并咪唑-1 -氧化物-3-氧基(16),2-(4-叠氮基苯基)-1,2,6-三苯基枯基(19),2-(3-叠氮基苯基)-4,4,5,5-四甲基-4,5二氢1H -咪唑-3-氧化物-1-氧基(21),和(3-叠氮基苯基) - ñ -叔丁基- ñ -aminoxyl(25)中的冷冻溶液中光解,得到小号= 3/2状态具有以下零场分裂参数的相应亚硝基苯基自由基的ESR谱:| D / hc | =0.277厘米- 1,| E / hc | ≤0.002厘米- 1(7从14); | D / hc | = 0.256 cm - 1,| E / hc | | ≤0.002厘米- 1(8从16); | D / hc | = 0.288 cm - 1,| E / hc | | ≤0.002厘米-
2-(4-叠氮苯基)-4,4,5,5-四甲基-4,5-二氢-1 H-咪唑-3-氧化物-1-氧基(14),2-(4-叠氮苯基)苯并咪唑-1 -氧化物-3-氧基(16),2-(4-叠氮基苯基)-1,2,6-三苯基枯基(19),2-(3-叠氮基苯基)-4,4,5,5-四甲基-4,5二氢1H -咪唑-3-氧化物-1-氧基(21),和(3-叠氮基苯基) - ñ -叔丁基- ñ -aminoxyl(25)中的冷冻溶液中光解,得到小号= 3/2状态具有以下零场分裂参数的相应亚硝基苯基自由基的ESR谱:| D / hc | =0.277厘米- 1,| E / hc | ≤0.002厘米- 1(7从14); | D / hc | = 0.256 cm - 1,| E / hc | | ≤0.002厘米- 1(8从16); | D / hc | = 0.288 cm - 1,| E / hc | | ≤0.002厘米-
Parity and Heteroatom Effects on Open-Shell Exchange Interactions: Nitrenophenyl Iminoylnitroxides
作者:Patrick Taylor、Paul R. Serwinski、Paul M. Lahti
DOI:10.1021/ol051295u
日期:2005.8.1
[GRAPHICS]Photolysis of pN3PhIN and mN3PhIN in frozen matrix yields pNPhIN and mNPhIN, respectively. pNPhIN gives a quartet state with nonlinear ESR intensity behavior (vertical bar D/hc vertical bar = 0.300 cm(-1), vertical bar E/hc vertical bar congruent to 0.0 cm(-1)); mNPhIN gives a thermally excited quartet state (vertical bar D/hc vertical bar = 0.336 cm(-1), vertical bar E/hc vertical bar = 0.006 cm(-1)) with inverse Curie behavior. Computations show little nitrene delocalization onto the radicals even for the para system. The NPhIN systems behave differently from analogous nitronylnitroxides due to asymmetric radical spin distribution.