# HYPERFINE CONSTANTS OF BROMINE- AND IODINE MONOFLUORIDE

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 Title: HYPERFINE CONSTANTS OF BROMINE- AND IODINE MONOFLUORIDE Creators: Müller, Holger S. P.; Gerry, Michael C. L. Issue Date: 1995 Publisher: Ohio State University Abstract: The $J^{\prime} - J^{\prime\prime} = 1 - 0$ rotational transitions of $^{79}BrF, ^{81}BrF$, and IF have been reinvestigated in the ground and first excited vibrational states using microwave Fourier transform spectroscopy. For IF, lines were also detected in the second excited vibrational state. Bromine and iodine nuclear quadrupole coupling constants, spin-rotation constants for all nuclei, and tensor and scalar spin-spin coupling constants (S and J), have been determined along with the rotational constants. Antishielding occurs at the fluorine nucleus for both BrF and IF, as has been found earlier for CIF. The antishielding has been rationalized following a model developed for CIF. Description: Author Institution: California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109; The University of British Columbia, 2036 Main Mall, Vancouver, B. C., Canada V6T 1Z1 URI: http://hdl.handle.net/1811/29613 Other Identifiers: 1995-RD-10