An Unknown Hydrocarbon Shows a Parent Peak on Its Mass $\delta$

question 37

Multiple Choice

An unknown hydrocarbon shows a parent peak on its mass spectra at m/z 86.There is no evidence of absorptions from visible or uv spectra.The IR shows no major absorptions outside the C-H stretch and bending vibrations.The ¹H NMR reveals a singlet at $\delta$ 0.9 (9H) , a triplet at $\delta$ 0.98 (3H) , and a quartet at $\delta$ 1.6 (2H) .

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