[ahhppull]

3,4-dibromo-2,5-dimethylhexane treated with excess k t-butoxide will form an alkyne and diene

My products are 2,5-dimethyl-3-hexyne and a conjugated diene.  Are my products correct?

Also, which product is formed?  The IR spectra shows bands at 3010,2995,2980,1610,1450,1380 and 1050 cm^-1.  I searched online and it says the alkyne will form, but from the IR spectra, it should be the diene that formed. 

[ahhppull]

Would a bulky base like t-butoxide also create an allene instead of a conjugated diene?

[orgopete]

Is this from an experiment? Can you give us some NMR or GC data? How about GC/MS?

[ahhppull]

Its not an experiment.