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We do a morphological, kinematic and chemical analysis of the disruptingcluster UBC 274 (2.5 Gyr, $d=1778$ pc) to study its global properties. We useHDBSCAN to obtain a new membership list up to 50 pc from its centre and up tomagnitude $G=19$ using Gaia EDR3 data. We use high resolution and highsignal-to-noise spectra to obtain atmospheric parameters of 6 giants andsubgiants, and individual abundances of 18 chemical species. The cluster has ahighly eccentric (0.93) component, tilted $\sim$10 deg with respect to theplane of the Galaxy, which is morphologically compatible with the result of atest-particle simulation of a disrupting cluster. Our abundance analysis showsthat the cluster has a subsolar metallicity of [Fe/H]$=-0.08\pm0.02$. Itschemical pattern is compatible with that of Ruprecht 147, of similar age butlocated closer to the Sun, with the remarkable exception of neutron-captureelements, which present an overabundance of $[n\mathrm{/Fe]}\sim0.1$. Thecluster's elongated morphology is associated with the internal part of itstidal tail, following the expected dynamical process of disruption. We find asignificant sign of mass segregation where the most massive stars appear 1.5times more concentrated than other stars. The cluster's overabundance ofneutron-capture elements can be related to the metallicity dependence of theneutron-capture yields due to the secondary nature of these elements, predictedby some models. UBC 274 presents a high chemical homogeneity at the level of$0.03$ dex in the sampled region of its tidal tails.

Unraveling UBC 274: a morphological, kinematical and chemical analysis of a disrupting open cluster