Matrix infrared spectroscopy of F2BMF and FBWF2 (M = Cr, Mo and W) complexes and quantum chemistry calculations
Literature Information
Bing Xu, Wenjing Li, Zhen Pu, Wenjie Yu, Tengfei Huang, Juanjuan Cheng, Xuefeng Wang
Laser-ablated group 6 transition metal atoms react with BF3 to yield typical transition metal inserted complexes F2B-MF (M = Cr, Mo, and W) and terminal borylene complex FBWF2. These products are investigated by using infrared spectroscopy, isotopic substitution and theoretical frequency calculations. The inserted complexes F2B–MF (M = Cr, Mo, and W) were identified by antisymmetric and symmetric stretching modes of F–B–F. The FBWF2 molecule has a 11B–F (10B–F) stretching frequency at 1453.2 (1505.0) cm−1 and the triple bond between boron and tungsten is confirmed by EDA-NOCV calculations, CASSCF calculation and NBO analysis. Furthermore, the bonding for tungsten complexes is compared with that of molybdenum and chromium complexes, which reveals interesting differences in their chemistries.
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