General | |
---|---|
Name | Silane |
Chemical formula | SiH4 |
Appearance | Colourless gas |
Physical | |
Formula weight | 32.1 amu |
Melting point | 88 K (-185 °C) |
Boiling point | 161 K (-112 °C) |
Density | 0.7 ×103 kg/m3 (liquid) |
Solubility | insoluble |
Thermochemistry | |
ΔfH0gas | ? kJ/mol |
ΔfH0liquid | ? kJ/mol |
ΔfH0solid | -1615 kJ/mol |
S0gas, 1 bar | ? J/mol·K |
S0liquid, 1 bar | ? J/mol·K |
S0solid | 283 J/mol·K |
Safety | |
Ingestion | Relatively low toxicity, but avoid exposure where possible. |
Inhalation | Relatively low toxicity: may cause coughing, hyperventilation. |
Skin | Irritant, may cause redness and swelling. |
Eyes | As for skin, may cause irritation. |
More info | Hazardous Chemical Database (http://ull.chemistry.uakron.edu/erd/chemicals/8/7034) |
SI units were used where possible. Unless otherwise stated, standard conditions were used. |
A silane is also the silicon analogue of a carbon alkane. Silanes consist of a chain of silicon atoms covalently bound to hydrogen atoms. The general formula of a silane is SinH2n+2
Silanes tend to be unstable because an Si-Si bond has a strength slightly lower than a C-C one. Oxygen decomposes silanes easily, as the silicon-oxygen bond is quite stable.
The nomenclature for naming silanes is regular, unlike alkanes. The name of each silane is given by a prefix for the number of silcon atoms (di, tri, tetra, penta, etc.) followed by the word silane. There is no prefix for one; it is understood.
Silanes can also be named like any other inorganic compound; in this naming system, silane would become silicon tetrahydride.
A cyclosilane[?] is a silane in a ring, just as a cycloalkane is an alkane in a ring.
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