Heterolytic and homolytic S_NO bond dissociation energies are determined in acetonitrile at 25 ℃ by using titration calorimetry and electrochemical measurements with a well designed thermodynamic cycle. The results s...Heterolytic and homolytic S_NO bond dissociation energies are determined in acetonitrile at 25 ℃ by using titration calorimetry and electrochemical measurements with a well designed thermodynamic cycle. The results suggest that S_NO compounds in vivo may release NO in a manner of homolytic bond dissociation. Other effects that influence the bond energies are also discussed. [WT5HZ]展开更多
There is an increasing interest for the study of NO affinity of organic nitrite,for the biological and physiological effects of organic nitrites seem to be due to their ability releasing NO.In this paper,NO chemical a...There is an increasing interest for the study of NO affinity of organic nitrite,for the biological and physiological effects of organic nitrites seem to be due to their ability releasing NO.In this paper,NO chemical affinities of ten benzyl nitrites were determined respectively by titration calorimetry and from a thermodynamic cycle in acetonitrile solution.The results show that ΔHhet of O—NO in the O-nitroso compounds were substantially larger than the corresponding ΔHhomo of O—NO in the same compounds,suggesting that these O-nitroso compounds were much easier release NO radical by the O—NO bond homolytic cleavage.It is believed that the structural and energetic information disclosed in this work should be useful in understanding chemical and biological functions of organic nitrites.展开更多
文摘Heterolytic and homolytic S_NO bond dissociation energies are determined in acetonitrile at 25 ℃ by using titration calorimetry and electrochemical measurements with a well designed thermodynamic cycle. The results suggest that S_NO compounds in vivo may release NO in a manner of homolytic bond dissociation. Other effects that influence the bond energies are also discussed. [WT5HZ]
文摘There is an increasing interest for the study of NO affinity of organic nitrite,for the biological and physiological effects of organic nitrites seem to be due to their ability releasing NO.In this paper,NO chemical affinities of ten benzyl nitrites were determined respectively by titration calorimetry and from a thermodynamic cycle in acetonitrile solution.The results show that ΔHhet of O—NO in the O-nitroso compounds were substantially larger than the corresponding ΔHhomo of O—NO in the same compounds,suggesting that these O-nitroso compounds were much easier release NO radical by the O—NO bond homolytic cleavage.It is believed that the structural and energetic information disclosed in this work should be useful in understanding chemical and biological functions of organic nitrites.
