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NatashaPfeiffer
New Contributor

What is the reaction?

Dbu and bromotrichloromethane, both aqueous, mixed together at room temperature. First changed from clear liquid to red, then darker. Then emitted a dark grey and black smoke, then turned into a black putty-like substance that spattered in the vial. Surface tension within the substance seemed very high and within a matter of moments, the spatter settled at the bottom of the vial. It seemed very exothermic as the vial was very hot. What could have happened here?

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Alexmadonik
Contributor

Re: What is the reaction?

The initial red color is probably bromine (Br2):


https://aip.scitation.org/doi/10.1063/1.1747207 

The polymer could be derived from dichlorocarbene / tetrachloroethylene or from phosgene:

https://pubs.acs.org/doi/abs/10.1021/ba-1973-0128.ch010 

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