采用紫外光电子能谱实验(PES)和量子化学方法对两种影响生态环境的亚硝基取代烷烃RONO[R=(CH3)2CH,(CH3)3CO]的电子结构进行了分析和讨论.实验得到两种化合物的第一电离能分别为10.37 eV和10.12eV,结合从头算自洽场分子轨道(ab initio S...采用紫外光电子能谱实验(PES)和量子化学方法对两种影响生态环境的亚硝基取代烷烃RONO[R=(CH3)2CH,(CH3)3CO]的电子结构进行了分析和讨论.实验得到两种化合物的第一电离能分别为10.37 eV和10.12eV,结合从头算自洽场分子轨道(ab initio SCF MO)计算和外壳层格林函数法(OVGF)计算对PES进行了分析和指认.研究表明化合物中取代基效应对电离能存在明显的影响;外层格林函数法计算得到电离能与实验吻合很好;同时发现在外层格林函数法计算结果中由于考虑相关能,得到的分子轨道存在能级顺序的交错.实验和理论计算结果进一步证实亚硝基取代烷烃是产生烷基氧自由基(RO)的很好的源物种,这为深入研究由它们产生的对环境破坏有着重要影响的相应自由基奠定了基础.展开更多
Twentyone N,N nitrobenzoyl substituted benzoylthiosemicarbazides were synthesized by addition reaction of nitrophenyl isothiocyanates with aroyl hydrazines and their structures were characterized by 1H NMR, 13 C NM...Twentyone N,N nitrobenzoyl substituted benzoylthiosemicarbazides were synthesized by addition reaction of nitrophenyl isothiocyanates with aroyl hydrazines and their structures were characterized by 1H NMR, 13 C NMR, IR and elemental analysis. The biological tests indicated that these compounds had antibacterial activity against B.subtilis , but no action on E.coli .展开更多
文摘采用紫外光电子能谱实验(PES)和量子化学方法对两种影响生态环境的亚硝基取代烷烃RONO[R=(CH3)2CH,(CH3)3CO]的电子结构进行了分析和讨论.实验得到两种化合物的第一电离能分别为10.37 eV和10.12eV,结合从头算自洽场分子轨道(ab initio SCF MO)计算和外壳层格林函数法(OVGF)计算对PES进行了分析和指认.研究表明化合物中取代基效应对电离能存在明显的影响;外层格林函数法计算得到电离能与实验吻合很好;同时发现在外层格林函数法计算结果中由于考虑相关能,得到的分子轨道存在能级顺序的交错.实验和理论计算结果进一步证实亚硝基取代烷烃是产生烷基氧自由基(RO)的很好的源物种,这为深入研究由它们产生的对环境破坏有着重要影响的相应自由基奠定了基础.
文摘Twentyone N,N nitrobenzoyl substituted benzoylthiosemicarbazides were synthesized by addition reaction of nitrophenyl isothiocyanates with aroyl hydrazines and their structures were characterized by 1H NMR, 13 C NMR, IR and elemental analysis. The biological tests indicated that these compounds had antibacterial activity against B.subtilis , but no action on E.coli .