Metal-Catalyzed Anaerobic Disproportionation of Hydroxylamine. Role of Diazene and Nitroxyl Intermediates in the Formation of N<sub>2</sub>, N<sub>2</sub>O, NO<sup>+</sup>, and NH<sub>3</sub>
作者:Graciela E. Alluisetti、Alejandra E. Almaraz、Valentín T. Amorebieta、Fabio Doctorovich、José A. Olabe
DOI:10.1021/ja046724i
日期:2004.10.1
NH(2)OH has been studied in anaerobic aqueous solution, pH 6-9.3, at 25.0 degrees C, with Na(3)[Fe(CN)(5)NH(3)].3H(2)O as a precursor of the catalyst, [Fe(II)(CN)(5)H(2)O](3)(-). The oxidation products are N(2), N(2)O, and NO(+) (bound in the nitroprusside ion, NP), and NH(3) is the reduction product. The yields of N(2)/N(2)O increase with pH and with the concentration of NH(2)OH. Fast regime conditions
NH(2)OH 的催化歧化已在厌氧水溶液中进行了研究,pH 值 6-9.3,在 25.0 摄氏度,与 Na(3)[Fe(CN)(5)NH(3)].3H(2) O 作为催化剂的前体,[Fe(II)(CN)(5)H(2)O](3)(-)。氧化产物是 N(2)、N(2)O 和 NO(+)(结合在硝普离子 NP 中),NH(3) 是还原产物。N(2)/N(2)O 的产量随着 pH 值和 NH(2)OH 的浓度而增加。快速制度条件涉及由 NH(2) 自由基引发的链过程,在 NH(2)OH 与 [Fe(II)(CN)(5)H(2)O](3)(-) 协调后生成。NH(3) 和硝酰基、HNO 是在这个快速过程中形成的,而 HNO 会导致生成 N(2)、N(2)O 和 NP。总是观察到在 440 nm 处吸收的中间体,其形成和衰减取决于介质条件。经紫外-可见、RR、和 (15) NMR 光谱作为二氮烯结合的