Texas A&M University-Commerce 1 article published in JoVE Chemistry Thermochemical Studies of Ni(II) and Zn(II) Ternary Complexes Using Ion Mobility-Mass Spectrometry Anna J. Corrales1, Anna V. Arredondo1, Amber A. Flores1, Chloe L. Duvak1, Charles L. Mitchell1, Riccardo Spezia2, Laurence A. Angel1 1Department of Chemistry, Texas A&M University-Commerce, 2Laboratoire de Chimie Théorique, Sorbonne Université This article describes an experimental protocol using electrospray-ion mobility-mass spectrometry, semi-empirical quantum calculations, and energy-resolved threshold collision-induced dissociation to measure the relative thermochemistry of the dissociation of related ternary metal complexes.