Abstract
The reactive molecule 1-phosphapropyne, CH 3CP, which is the phosphorus analogue of methylcyanide CH 3CN, has been detected by microwave spectroscopy in the pyrolysis products of ethyldichlorophosphine CH 3CH 2PCl 2. The J = 3 ← 2 and J = 4 ← 3 symmetric top transitions have been assigned and a value of B 0 = 4991.339 ± 0.010 MHz obtained. These results indicate that alkyl substituted analogues of phospha-acetylene, HCP can be produced by the pyrolysis of the appropriately substituted dichlorophosphine.
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