一氧化氮不僅是生理和病理學中的重要的分子，而且在細菌的反硝化過程中是必要的中間物。為了了解生物系統中的亞硝酰亞鐵中間體，本實驗得到及研究了幾種亞硝酰亞鐵錯合物。我們得到[PPh4][Fe(PS3”)(NO)] (1)、[Fe(PS3”)(NO)] (2)和 [Fe(PSS-S”)2(NO)] (3)。錯合物1和3是屬於{FeNO}7形式。錯合物2是屬於{FeNO}6形式。錯合物1和2都是鐵為中心的五配位扭曲雙三角錐幾何結構。然而，錯合物3是鐵為中心的結構，其幾何結構偏向於扭曲雙三角錐幾何結構。三種錯合物都經由紫外光-可見光-進紅外光光譜和核磁共振光譜進行分析和鑑定。電化學性質已經經由循環伏安法進行研究，而磁性化學則經由超導量子干涉震動磁量儀和電子順磁共振儀進行研究。
另外，本實驗還研究[PPh4][Fe(PS3”)(CH3CN)] (4)和[PPh4][Fe(PS3”)(OCH3)] (5)與亞硝酸鹽的反應。錯合物4和5已經被我們實驗室所研究。電噴灑游離質譜和紫外光-可見光-進紅外光光譜用來追蹤反應變化。而向[PPh4][Fe(PS3”)(CH3CN)] (4)溶液加入4~5當量的亞硝酸鹽最終形成[PPh4][Fe(PS3”)(NO)] (1)。在電噴灑游離質譜中觀察到反應的中間體，於是闡明了反應途徑。

Nitric oxide (NO) is not only an important small molecule in physiology and pathology but also an essential intermediate during the denitrifying process in bacteria. In order to understand iron nitrosyl intermediates in biological systems, several iron nitrosyl complexes are obtained and studied at this work. They are [PPh4][Fe(PS3”)(NO)] (1), [Fe(PS3”)(NO)] (2) and [Fe(PSS-S”)2(NO)] (3) (PS3”: tris(benzenethiolato)phosphine). Complexes 1 and 3 are {FeNO}7 species. Complex 2 is a {FeNO}6 species. Complexes 1 and 2 both have five-coordinated iron centers with distorted trigonal bipyramidal geometry, but complex 3 embraces a five-coordinated iron center, and the geometry of complex 3 is more likely trigonal bipyramid geometry. All three complexes have been characterized by UV-vis-NIR and NMR spectroscopies. The electrochemical properties have been studied by cyclic voltammogram and magnetic nature is investigated by SQUID and EPR measurements.
In addition, reactions of [PPh4][Fe(PS3”)(CH3CN)] (4) and [PPh4][Fe(PS3”)(OCH3)] (5), reported previously in our laboratory, with nitrite are also investigated. The ESI-MS and UV-vis-NIR spectroscopies are used to follow the reaction profiles. Adding 4~5 equivalents of nitrite to [PPh4][Fe(PS3”)(CH3CN)] (4) results in the formation of [PPh4][Fe(PS3”)(NO)] (1). The reaction intermediates are observed in ESI-MS spectra. The reaction pathways are elucidated accordingly.

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