The 2-butyn-1-yl radical is an isomer of CH and is structurally similar to the propargyl radical, which is the simplest resonance-stabilized hydrocarbon radical. The CH radical is likely to be important to astrochemistry and combustion, similar to propargyl, yet little research has been done on its spectroscopic properties. In this work, seven vibrational bands of the 2-butyn-1-yl radical are reported.
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