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A recent ALMA study of the Seyfert 2 Active Galactic Nucleus (AGN) NGC 2110by Rosario et al. (2019) has reported a remarkable lack of CO 2-1 emission fromthe circumnuclear region, where optical lines and H2 emission are observed,leading to the suggestion of excitation of the molecular clouds by the AGN.Since interaction with X-ray photons could be the cause of this excitation, wehave searched the archival Chandra data for corroborating evidence. We reportan extra-nuclear ~1'' (~170 pc) feature found in the soft (<1.0 keV) Chandradata of the Seyfert 2 Active Galactic Nucleus (AGN) NGC 2110. This feature iselongated to the north of the nucleus and its shape matches well that of theoptical lines and H2 emission observed in this region, which is devoid of CO2-1 emission. The Chandra image completes the emerging picture of a multi-phasecircumnuclear medium excited by the X-rays from the AGN, with dense warmmolecular clouds emitting in H2 but depleted of CO 2-1 emission.

X-ray Photons in the CO 2-1 'Lacuna' of NGC 2110