Molecular beam optical Stark study of rhodium mononitride

The optical Stark effect in the Q(1) and R(0) lines of the 15.1]1-X (1)Sigma+ (1,0) band of rhodium mononitride (RhN) were recorded and analyzed to determine the permanent electric dipole moments mu for the X (1)Sigma+(upsilon=0) and 15.1]1(upsilon=1) states to be 2.43(5) and 1.75(1) D, respectively. The determined dipole moments are compared to predicted values obtained from density functional theory Stevens et al., Chem. Phys. Lett. 421, 281 (2006)] and an all-electron ab initio calculation Shim et al., J. Mol. Struct. THEOCHEM 393, 127 (1997)]. A simple single configuration molecular orbital correlation diagram is used to rationalize the relative values of mu for the 4d mononitrides and RhO. An electronic configuration for the 15.1]1 state is proposed based on the interpretation of the (103)Rh and (14)N magnetic hyperfine interactions.