On the Detection of Iminomethylium, HCNH+, in Space

L. M. Ziurys and B. E. Turner
reported on
HCNH+ – A New Interstellar Molecular Ion,
Astrophys. J. 302, L31 – L36 (1986).
The J" = 0, 1, and 2 transitions near 74.1, 148.2 and 222.3 GHz were detected in emission toward Sgr B2(OH) using the NRAO 12 m dish for the former, and the Texas MWO 4.9 m dish for the latter two transitions.

L. M. Ziurys, A. J. Apponi, and J. T. Yoder
reported on the
Detection of the Quadrupole Hyperfine Structure in HCNH+,
Astrophys. J. 397, L123 – L126 (1992).
They detected the ground state transition toward the dark cloud TMC-1 using the NRAO 12 m dish.

Contributor(s): H. S. P. Müller; 07, 2015