Sulfonyl fluoride anion (SO₂F₂^–) was produced during codeposition of laser-ablated metal atoms, ions, and electrons with SO₂F₂ in argon and neon matrixes at 4 K. The structure of SO₂F₂^– was determined by infrared spectroscopy and density functional theory calculations. On the basis of the experiments using ³⁴SO₂F₂ and S¹⁸O₂F₂ samples, the three absorptions at 1284.9, 1109.3, and 567.0 cm^–1 in argon and 1289.0, 1116.2, and 576.8 cm^–1 in neon were assigned to the antisymmetric and symmetric O–S–O stretching and SO₂ wagging modes of SO₂F₂^–, respectively. These assignments were further supported by frequency and isotopic frequency ratio calculations. The SO₂F₂^– anion possesses a ²A₁ ground state with nonplanar C_2v symmetry. Compared with the neutral SO₂F₂ molecule, dramatic increases in the S–F bond length (0.295 Å) and F–S–F bond angle (41.0°) were found for the anion, which result from the S–F antibonding character of the singly occupied molecular orbital. The SO₂F₂^– anion was formed via electron capture by SO₂F₂ in the gas phase before being deposited into the cryogenic matrix. The matrix environment stabilized this anion, but it was destroyed by UV–vis irradiation and presumably converted to the neutral SO₂F₂ molecule.

中文翻译：

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所述SO的红外光谱₂ ˚F ₂ ^-阴离子固氩和氖

磺酰氟阴离子（SO ₂ ˚F ₂ ^- ）中的溶液激光烧蚀金属原子，离子，并用SO电子的共沉积过程中产生的₂ ˚F ₂在4 K的SO结构在氩和氖矩阵₂ ˚F ₂ ^-被确定红外光谱和密度泛函理论计算。关于使用的实验基础³⁴ SO ₂ ˚F ₂和S ¹⁸ ö ₂ ˚F ₂个样品，1284.9三个吸收，1109.3，和567.0厘米^-1在氩气中和1289.0，1116.2，和576.8厘米^-1霓虹灯中的分别分配给SO ₂ F ₂ ^–的反对称和对称O–S–O拉伸和SO ₂摆动模式。这些指配得到频率和同位素频率比计算的进一步支持。所述SO ₂ ˚F ₂ ^-阴离子拥有²阿_1个与非平面基态Ç _{2 v}对称性。与中性SO ₂ F _2相比分子中，发现阴离子的SF键长（0.295Å）和F–SF键角（41.0°）急剧增加，这是由于单个占据的分子轨道的SF反键特性引起的。所述SO ₂ ˚F ₂ ^-阴离子经由电子俘获由SO形成₂ ˚F ₂在气相沉积入低温基质之前。基质环境稳定了该阴离子，但被紫外线可见光破坏，并可能转化为中性SO ₂ F ₂分子。