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An intermolecular potential energy surface and rovibrational transition frequencies are computed for CO2–C2H2. An interpolating moving least squares method is used to fit ab initio points at the explicitly correlated coupled-cluster level. The rovibrational Schrödinger equation is solved with a symmetry-adapted Lanczos algorithm. The computed disrotatory and torsion vibrational levels of both CO2–C...
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