| The chlorine and bromine derivatives are known. |
| Decachlorosilicobutane, Si4Cl10, is among the products of the action of the electric discharge on a mixture of hydrogen and silicon tetrachloride. It is a liquid boiling at 149°-151° C. under 15 mm. pressure. |
| Decabromosilicobutane, Si4Br10, is formed, together with its homologues, when the silent electric discharge acts on silicobromoform, It is a crystalline solid, melting with decomposition at 185° C. |