Knowledge Bank

The microwave spectrum of AlCCH (X$\mathrm{<mrow\; data-mjx-texclass="ORD">1</mrow>}\Sigma +$) has been measured using Fourier transform microwave (FTMW) techniques in the frequency range of 9-40 GHz. This molecule was created in a supersonic expansion by the reaction of trimethyl aluminum, Al(CH$3$)$3$, and acetylene, C$2$H$2$, or methane, CH$4$, diluted in argon carrier gas, using a pulsed nozzle coupled with a dc discharge. Spectra of Al$\mathrm{<mrow\; data-mjx-texclass="ORD">12</mrow>}$C$\mathrm{<mrow\; data-mjx-texclass="ORD">13</mrow>}$CH, Al$\mathrm{<mrow\; data-mjx-texclass="ORD">13</mrow>}$C$\mathrm{<mrow\; data-mjx-texclass="ORD">12</mrow>}$CH, Al$\mathrm{<mrow\; data-mjx-texclass="ORD">13</mrow>}$C$\mathrm{<mrow\; data-mjx-texclass="ORD">13</mrow>}$CH, Al$\mathrm{<mrow\; data-mjx-texclass="ORD">12</mrow>}$C$\mathrm{<mrow\; data-mjx-texclass="ORD">12</mrow>}$CD have also been recorded. From these data, rotational constants and Al and D hyperfine parameters have been determined, as well as the r$\mathrm{<mrow\; data-mjx-texclass="ORD">(1)</mrow>}$ structure. AlCCH is a model system for heteroatom dicarbide species.