Polythiazyl
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Polythiazyl
| Polythiazyl | |
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Other names
polythiazyl |
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| Identifiers | |
| CAS number | 56422-03-8  |
| Properties | |
| Molecular formula | (SN)x |
| Appearance | bronze colour, metallic lustre[1] |
 (verify) (what is:  / ?)Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) |
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| Infobox references | |
Polythiazyl (polymeric sulfur nitride), (SN)x, was the first conducting inorganic polymer.[1] In addition to being an electrical conductor, it was also found to be a superconductor at very low temperatures (below 0.26 K).[2]
Structure and bonding
Several resonance structures can be written:[3]
Synthesis
Polythiazyl is synthesized from tetrasulfur tetranitride (S4N4) via disulfur dinitride (S2N2), in the following way:[1]
- S4N4 + 8 Ag → 4 Ag2S + 2 N2
- S4N4 (w/ Ag2S catalyst) → 2 S2N2 (w/ 77K cold finger) → S2N2
- S2N2 (@ 0°C, sublimes to surface) → thermal polymerization → (SN)x
References
- ^ a b c Greenwood, N. N.; Earnshaw, A. (1997). Chemistry of the Elements (2nd ed.). Butterworth–Heinemann. pp. 725–727. ISBN 0080379419.
- ^ Labes, M. M.; Love, P.; Nichols, L. F. (1979). "Polysulfur Nitride - a Metallic, Superconducting Polymer". Chemical Reviews 79 (1): 1–15. doi:10.1021/cr60317a002.
- ^ Okada, M.; Tanaka, K.; Takata, A.; Yamabe, T. (1993). "Examination of Electronic Phase of the Hartree-Fock Solution of an Isolated Polythiazyl Chain". Synthetic Metals 59 (2): 223–230. doi:10.1016/0379-6779(93)91029-2.
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