Table 3
Assignments for IR absorption bands in the spectra of amorphous (20 K) and crystalline (170 K) hydroxylamine ice.
| Band assignment | Neat NH2OH Ice | ||||||
|---|---|---|---|---|---|---|---|
| Amorphous Ice | Crystalline Ice | ||||||
| Band position (cm–1) | Range (cm–1) | Av (10–18 cm molecule–1) | Band position (cm–1) | Range (cm–1) | Av (amorph)/Av (cryst) | ||
| v (OH) | |||||||
| vasym (NH2) | 3314 | 3619–2187 | 122 | 3323 | 3619–2187 | 1.02 | |
| vsym (NH2) | 3261 | 3261 | |||||
| 3199 | 3199 | ||||||
| 2v3 | 3080 | 3080 | |||||
| v2, v (OH) | 2903 | 2875 | |||||
| v3 + v4 | 2789 | 2780 | |||||
| 2v6 | 2682 | 2679 | |||||
| v3, δ (HNH) | 1610 | 1707–1570 | 1.0 | 1670 | 1747–1576 | 2.18 | |
| 1558 | |||||||
| 1503 | 1570–1367 | 3.7 | 1507 | 1575–1419 | 0.90 | ||
| δ (HNO) | 1473 | ||||||
| tw (NH2) | 1313 | 1363–1274 | 0.3 | 1280 | 1334–1245 | 1.03 | |
| 1205 | |||||||
| w (NH2) | 1188 | 1274–1060 | 9.0 | 1183 | 1242–1070 | 1.01 | |
| 1168 | |||||||
| 987 | 1033–716 | 6.0 | 946 | 1053–716 | 1.80 | ||
| v5, v (NO) | 920 | 925 | |||||
| 902 | 906 | ||||||
| v6, r (NH2) | 855 | 849 | |||||
Notes. Assignments were made based on the previous works of Nightingale & Wagner (1954) and Luckhaus (1997). Band strength constants for major wavenumber ranges are also given. N.B. DB = dangling bonds; asym = asymmetric; sym = symmetric; v = stretching, δ = bending; w = wagging; tw = twisting; r = rocking.
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