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• W1974080297 abstract "The structure, stability, and thermochemistry of the still experimentally unknown Be+–(NF3) and Mg+–(NF3) complexes have been theoretically investigated at the B3LYP, RCCSD, and RCCSD(T) levels of theory in conjunction with the 6-311G(d), 6-311 + G(2d), and 6-311 + G(3df) basis sets. Compared with the previously investigated H+–(NF3), Li+–(NF3), Na+–(NF3), and K+–(NF3), the study of M+–(NF3) (M = Be or Mg) has revealed novel and somewhat unexpected features of the interaction of NF3 with monoatomic ions. Thus, irrespective of the employed theoretical level, the ligation of Be+ and Mg+ to NF3 leads to the formation of two distinct isomers, namely the M+–NF3 nitrogen-coordinated complexes 1 (M = Be) and 5 (M = Mg) and the insertion products of F2N–MF+ connectivity 2 (M = Be) and 6 (M = Mg). On the other hand, at variance with M+–(NF3) (M = Li, Na, and K), neither the fluorine-monocoordinated nor the fluorine-dicoordinated structure were located as minima on the potential energy surface. The geometry and bonding analysis of the M+–NF3 isomers 1 and 5 and of the F2N–MF+ isomers 2 and 6 point to ion–dipole complexes between M+ and NF3 and MF+ and NF2, respectively. At the RCCSD(T)/6-311 + G(2d)//RCCSD/6-311G(d) level of theory and 298.15 K, the insertion products 2 and 6 are more stable than the nitrogen-coordinated isomers 1 and 5 by 109.2 and 59.2 kcal mol−1, respectively. In addition, assuming the formation of 2 and 6, the Be+ and Mg+ ion affinities of NF3 result as high as 127.3 and 62.5 kcal mol−1, respectively. Our results suggest that the Be+–(NF3) and Mg+–(NF3) complexes could be actually observed as stable species in the gas phase, and support the proposal that techniques such as Mg+ ion attachment mass spectrometry could be used to quantify the emissions of NF3, one of the perfluorocompounds most extensively used in semiconductor technology." @default.
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• W1974080297 date "2006-09-01" @default.
• W1974080297 modified "2023-09-29" @default.
• W1974080297 title "Ligation of Be+ and Mg+ to NF3: Structure, stability, and thermochemistry of the Be+–(NF3) and Mg+–(NF3) complexes" @default.
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• W1974080297 doi "https://doi.org/10.1016/j.ijms.2005.07.009" @default.
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