Magnetic circular dichroism and electronic structure of [Re2X4(PMe3)4]+ (X = Cl, Br).
Magnetic circular dichroism (MCD) and electronic absorption spectroscopies have been used to probe the electronic structure of the classical paramagnetic metal-metal-bonded complexes [Re2X4(PMe3)4](+) (X = Cl, Br). A violation of the MCD sum rule is observed that indicates the presence of ground-state contributions to the MCD intensity. The z-polarized δ → δ* band in the near-IR is formally forbidden in MCD but gains intensity through a combination of ground- and excited-state mechanisms to yield a positive C term.
Department of Chemistry and Chemical Biology, The University of New Mexico , MSC03 2060, 1 University of New Mexico, Albuquerque, New Mexico 87131-0001, United States.
Diana
D
Habel-Rodriguez
Frederic
F
Poineau
Erik V
EV
Johnstone
Kenneth R
KR
Czerwinski
Alfred P
AP
Sattelberger
Martin L
ML
Kirk