Synthesis, spectroscopic characterization, and structure of closo-1,10-B10H3F22- and related fluorinated derivatives of B10H102-

The treatment of salts of the B10H102- anion with the commercially available N-fluoro reagent 1-chloromethyl-4-fluoro-1, 4-diazoniabicyclo[2.2.2]octane bis(tetrafluoroborate) (F-TEDA) resulted in the formation of fluorinated derivatives of this ten-vertex borane dianion. The effects of changing the solvent, temperature, and reagent stoichiometry were studied. The derivatives 1-B10H9F2-, 2-B10H9F2-, 1,2-B10H8F22- 1,6-B10H8F22-, 1,10-B10H8F22-, and 1,2,10-B10H7F32- were examined by a combination of B-11 and F-19 NMR spectroscopy and by IR spectroscopy. The salt [Ph4P](2)[1,10-B10H8F2]. 3CH(2)Cl(2) was structurally characterized by single-crystal X-ray crystallography: C51H48B10Cl6F2P2, monoclinic, C2/c, a = 13.8134(9), b = 19.141(1), c = 21.136(1) Angstrom, beta = 91.546(1)degrees, Z = 4, T = -100 degrees C, R = 0.077.