The bond length of ZrAr+

The photodissociation spectrum of isolated ZrAr+ has been observed. The bond length in the vibrationless ground state is r0 = 2.718 ± 0.01 Å with Ω″ = 32. The c state of this ion has Ω′ = 55, an electronic origin at T00 = 15580 cm−1, a vibrational frequency of ωe = 74.9 cm−1, an anharmonicity of ωexe = 1.15 cm−1, an equilibrium rotational constant of Be = 0.0655, and a rotation-vibration constant of αe = 0.00154 cm−1. The bond length of this excited state is r0 = 3.050 ± 0.01 Å with a diabatic bond energy of 1170 ± 20 cm−1. Assignment of the c-X band convergence places the adiabatic binding energy of ground state of ZrAr+ at D0 = 2706 ± 20 cm−1.